Accessory identification device and forklift loader

Abstract

The utility model discloses an accessory identification device and a forklift loader, the forklift loader is provided with an arm support and a plurality of accessories of different types, the accessories are used for being installed on the arm support, and the device comprises an arm support side identification module and a plurality of accessory side identification modules. The plurality of accessory side identification modules are used for being respectively arranged on different types of accessories, each accessory side identification module is provided with a first signal input end and a plurality of first signal output ends, and at least one first signal output end of any two accessory side identification modules has different port connection states. The arm support side identification module is used for being arranged on an arm support and comprises a control module, the control module is provided with a second signal output end and a plurality of second signal input ends, and under the condition that the accessory is installed on the arm support, the second signal output ends are connected with the first signal input ends; the plurality of second signal input ends are correspondingly connected with the plurality of first signal output ends.

Description

Technical Field

[0001] The present application relates to the technical field of forklifts, and in particular to an attachment identification device and a forklift. Background Art

[0002] A forklift is a kind of engineering machinery used to load and carry heavy objects. Generally, there are multiple attachments to choose from, which are used in different application scenarios. For example, the fork is used to carry regular-shaped goods, the hook is used to lift irregular-shaped heavy objects, and the work platform is used to carry people. Different types of attachments correspond to different load diagrams. Only when working under the corresponding load diagram can the whole vehicle be stable and not overturned. Therefore, it is a very critical step to identify different attachments and select different load diagrams accordingly.

[0003] One existing technology uses an RFID reader and a tag to identify different types of attachments, and then matches different load diagrams according to different types of attachments. However, this method is easily affected by the environment. For example, in the case of strong electromagnetic interference in the surrounding environment, inaccurate identification may occur. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an attachment identification device and a forklift, which can solve the problem that the traditional attachment identification technology is easily affected by the environment.

[0005] According to the first aspect of the present application, the attachment identification device is applied to a forklift, wherein the forklift has a boom and a plurality of different types of attachments, wherein the attachments are used to be installed on the boom, and the device includes:

[0006] A plurality of accessory side identification modules, wherein the plurality of accessory side identification modules are used to be respectively arranged on different types of accessories, each of the accessory side identification modules has a first signal input terminal and a plurality of first signal output terminals, and at least one of the first signal output terminals of any two of the accessory side identification modules has a different port connection state, and the port connection state is: a connection state between the first signal output terminal and the first signal input terminal in the same accessory side identification module;

[0007] A boom side identification module, the boom side identification module is used to be arranged on the boom, the boom side identification module includes a control module, the control module has a second signal output end and a plurality of second signal input ends, when the attachment is installed on the boom, the second signal output end is connected to the first signal input end, and the plurality of second signal input ends are correspondingly connected to the plurality of first signal output ends;

[0008] The control module sends an identification signal to the first signal input terminal through the second signal output terminal, so that based on the port connection status of the first signal output terminal, the port voltage of the second signal input terminal corresponding to the first signal output terminal is changed, thereby confirming the type of the accessory according to the port voltages of multiple second signal input terminals.

[0009] According to some embodiments of the present application, the port connection state of the first signal output end is any one of a first connection state and a second connection state, the first connection state is: a state in which the first signal input end is connected to the first signal output end, and the second connection state is: a state in which the first signal input end is disconnected from the first signal output end.

[0010] According to some embodiments of the present application, the port connection state of the first signal output end is any one of a first connection state, a second connection state and a third connection state, the first connection state is: the first signal input end and the first signal output end are connected through a wire, the second connection state is: the first signal input end and the first signal output end are disconnected, and the third connection state is the first signal input end and the first signal output end are connected through a resistor.

[0011] According to some embodiments of the present application, the third signal input terminal of the control module is connected to the output terminal of the key switch of the forklift.

[0012] A forklift according to an embodiment of the second aspect of the present application includes the accessory identification device as described above.

[0013] According to a third aspect of the present application, a method for identifying an accessory is applied to the above-mentioned accessory identification device. The method includes:

[0014] When the attachment is installed on the boom, an identification signal is sent to the first signal input end through the second signal output end, so that based on the port connection state of the first signal output end, the port voltage of the second signal input end correspondingly connected to the first signal output end is changed;

[0015] Acquiring port voltages of a plurality of the second signal input terminals;

[0016] The type of the accessory is determined according to the port voltages of the plurality of second signal input terminals.

[0017] According to some embodiments of the present application, the port connection state of the first signal output end is any one of a first connection state and a second connection state, the first connection state is a state in which the first signal input end is connected to the first signal output end, and the second connection state is a state in which the first signal input end is disconnected from the first signal output end.

[0018] The step of sending an identification signal to the first signal input terminal through the second signal output terminal so as to change a port voltage of the second signal input terminal correspondingly connected to the first signal output terminal based on the port connection state of the first signal output terminal comprises:

[0019] The identification signal is sent to the first signal input terminal through the second signal output terminal, so that the port voltage of the first target input terminal is high level, and the port voltage of the second target input terminal is low level, the first target input terminal is: the second signal input terminal connected to the first target output terminal, the first target output terminal is: the first signal output terminal in the first connection state, the second target input terminal is: the second signal input terminal connected to the second target output terminal, and the second target output terminal is: the first signal output terminal in the second connection state.

[0020] According to some embodiments of the present application, the step of confirming the type of the accessory according to the port voltages of the plurality of second signal input terminals includes:

[0021] Based on the port sequence of the plurality of second signal input terminals, the port voltages of the plurality of second signal input terminals are sorted to obtain a target voltage sequence;

[0022] Based on the high and low levels of multiple port voltages in the target voltage sequence, the target voltage sequence is converted into a binary number to obtain a target binary number;

[0023] Obtaining a first numerical type mapping relationship, where the first numerical type mapping relationship is a correspondence relationship between a plurality of binary numbers and a plurality of types of the attachments;

[0024] The type of the attachment is determined according to a mapping relationship between the target binary number and the first numerical type.

[0025] According to some embodiments of the present application, the port connection state of the first signal output end is any one of a first connection state, a second connection state and a third connection state, the first connection state is a state in which the first signal input end is connected to the first signal output end through a wire, the second connection state is a state in which the first signal input end is disconnected from the first signal output end, and the third connection state is a state in which the first signal input end is connected to the first signal output end through a resistor.

[0026] The step of sending an identification signal to the first signal input terminal through the second signal output terminal so as to change a port voltage of the second signal input terminal correspondingly connected to the first signal output terminal based on the port connection state of the first signal output terminal comprises:

[0027] The identification signal is sent to the first signal input terminal through the second signal output terminal, so that the port voltage of the first target input terminal is a high level, the port voltage of the second target input terminal is a low level, and the port voltage of the third target input terminal is an intermediate voltage, and the intermediate voltage is a voltage between the high level and the low level. The first target input terminal is: the second signal input terminal connected to the first target output terminal, the first target output terminal is: the first signal output terminal in the first connection state, the second target input terminal is: the second signal input terminal connected to the second target output terminal, the second target output terminal is: the first signal output terminal in the second connection state, the third target input terminal is: the second signal input terminal connected to the third target output terminal, and the third target output terminal is: the first signal output terminal in the third connection state.

[0028] According to some embodiments of the present application, the step of confirming the type of the accessory according to the port voltages of the plurality of second signal input terminals includes:

[0029] Based on the port sequence of the plurality of second signal input terminals, the port voltages of the plurality of second signal input terminals are sorted to obtain a target voltage sequence;

[0030] Based on the voltage magnitudes of the multiple port voltages in the target voltage sequence, converting the target voltage sequence into a ternary number to obtain a target ternary number;

[0031] Obtaining a second numerical type mapping relationship, where the second numerical type mapping relationship is a correspondence relationship between a plurality of ternary numbers and a plurality of types of the attachments;

[0032] The type of the attachment is determined according to a mapping relationship between the target ternary number and the second numerical type.

[0033] The embodiments of the present application have at least the following beneficial effects:

[0034] When the accessory is installed on the arm, an identification signal is sent to the first signal input terminal through the second signal output terminal, so that based on the port connection state of the first signal output terminal, the port voltage of the second signal input terminal corresponding to the first signal output terminal is changed. Since the port connection state of at least one first signal output terminal of any two accessory-side identification modules is different, for any two accessory-side identification modules, the port voltage of at least one second signal input terminal of the multiple second signal input terminals of the control module is different. The type of accessory can be distinguished by the difference in the port voltage of the second signal input terminal in the accessory-side identification module, thereby performing identification. Compared with traditional accessory identification technology, the accessory identification device of the embodiment of the present application is not easily affected by the environment and can accurately identify the type of accessory.

[0035] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0037] Figure 1 This is a schematic diagram of the structure of a forklift in one embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of the structure of an accessory side identification module in one embodiment of the present application;

[0039] Figure 3 This is a structural diagram of the arm side identification module in one embodiment of the present application;

[0040] Figure 4 Schematic diagram a of the connection between the arm side identification module and the attachment side identification module in one embodiment of the present application;

[0041] Figure 5 Schematic diagram b of the connection between the arm side identification module and the attachment side identification module in one embodiment of the present application;

[0042] Figure 6 Schematic diagram c of the connection between the arm side identification module and the attachment side identification module in one embodiment of the present application;

[0043] Figure 7 Flow chart of an identification method in one embodiment of the present application.

[0044] Reference numerals:

[0045] Forklift 100, boom 110, attachment 120, attachment side identification module 130, boom side identification module 140,

[0046] A first signal input terminal 200, a first signal output terminal 210, a second signal input terminal 220, a second signal output terminal 230, a resistor 240,

[0047] Control module 300. DETAILED DESCRIPTION

[0048] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0049] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] In the description of this application, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0051] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0052] Refer to the following Figures 1 to 7 An attachment identification device, a forklift 100 and an attachment identification method according to an embodiment of the present application are described.

[0053] The attachment identification device of the embodiment of the present application is applied to a forklift 100, such as Figure 1 As shown, the forklift 100 has a boom 110 and a plurality of different types of attachments 120, the attachments 120 are used to be installed on the boom 110, and the device includes a boom side identification module 140 and a plurality of attachment side identification modules 130. The plurality of attachment side identification modules 130 are used to be respectively set on different types of attachments 120. Figure 2As shown, each accessory side identification module 130 has a first signal input terminal 200 and multiple first signal output terminals 210. Any two accessory side identification modules 130 have at least one first signal output terminal 210 with a different port connection status. The port connection status is: the connection status between the first signal output terminal 210 and the first signal input terminal 200 in the same accessory side identification module 130.

[0054] The arm side identification module 140 is used to be arranged on the arm 110, such as Figure 3 As shown, the arm side identification module 140 includes a control module 300, and the control module 300 has a second signal output terminal 230 and a plurality of second signal input terminals 220. Figure 4 As shown, when the attachment 120 is installed on the boom 110 , the second signal output end 230 is connected to the first signal input end 200 , and the plurality of second signal input ends 220 are correspondingly connected to the plurality of first signal output ends 210 .

[0055] The control module 300 sends an identification signal to the first signal input terminal 200 through the second signal output terminal 230, so that based on the port connection status of the first signal output terminal 210, the port voltage of the second signal input terminal 220 corresponding to the first signal output terminal 210 is changed, thereby confirming the type of the accessory 120 according to the port voltages of multiple second signal input terminals 220.

[0056] In this embodiment, when the attachment 120 is installed on the boom 110, an identification signal is sent to the first signal input terminal 200 through the second signal output terminal 230, so that based on the port connection state of the first signal output terminal 210, the port voltage of the second signal input terminal 220 corresponding to the first signal output terminal 210 is changed. Since the port connection state of at least one first signal output terminal 210 of any two attachment-side identification modules 130 is different, for any two attachment-side identification modules 130, the port voltage of at least one second signal input terminal 220 of the control module 300 is different. Further, the port voltages of the multiple second signal input terminals 220 are obtained, and then the type of the attachment 120 can be confirmed according to the port voltages of the multiple second signal input terminals 220. Compared with the traditional attachment 120 identification technology, the attachment identification device of the embodiment of the present application is not easily affected by the environment and can accurately identify the type of the attachment 120, thereby matching the corresponding load diagram.

[0057] In one embodiment of the present application, the port connection state of the first signal output terminal 210 is any one of a first connection state and a second connection state, the first connection state is: a state in which the first signal input terminal 200 is connected to the first signal output terminal 210, and the second connection state is: a state in which the first signal input terminal 200 is disconnected from the first signal output terminal 210.

[0058] In this embodiment, the control module 300 sends an identification signal through the second signal output terminal 230, and the identification signal is a high-level signal. If the first signal output terminal 210 is in the first connection state, the identification signal passes through the first signal input terminal 200, the first signal output terminal 210 to the corresponding second signal input terminal 220 in sequence, so that the port voltage of the corresponding second signal input terminal 220 changes, that is, the port voltage becomes a high level. If the first signal output terminal 210 is in the second connection state, since the first signal input terminal 200 and the first signal output terminal 210 are disconnected, the identification signal cannot be input to the corresponding second signal input terminal 220, so the port voltage of the corresponding second signal input terminal 220 is a low level.

[0059] like Figure 5 As shown, Figure 5 The attachment-side identification module 130 has seven first signal output terminals 210 , six of which are in the first connection state, and one first signal output terminal is in the second connection state.

[0060] In one embodiment of the present application, the port connection state of the first signal output terminal 210 is any one of a first connection state, a second connection state and a third connection state. The first connection state is a state in which the first signal input terminal 200 and the first signal output terminal 210 are connected through a wire, the second connection state is a state in which the first signal input terminal 200 and the first signal output terminal 210 are disconnected, and the third connection state is a state in which the first signal input terminal 200 and the first signal output terminal 210 are connected through a resistor 240.

[0061] In this embodiment, the control module 300 sends an identification signal through the second signal output terminal 230, and the identification signal is a high-level signal. If the first signal output terminal 210 is in the first connection state, the identification signal passes through the first signal input terminal 200, the first signal output terminal 210 to the corresponding second signal input terminal 220 in sequence, so that the port voltage of the corresponding second signal input terminal 220 changes, that is, the port voltage becomes a high level. If the first signal output terminal 210 is in the second connection state, since the first signal input terminal 200 and the first signal output terminal 210 are disconnected, the identification signal cannot be input to the corresponding second signal input terminal 220, so the port voltage of the corresponding second signal input terminal 220 is a low level. If the first signal output terminal 210 is in the third connection state, the identification signal passes through the first signal input terminal 200, the resistor 240 and the first signal output terminal 210 to the corresponding second signal input terminal 220 in sequence, so that the corresponding port voltage changes, and due to the voltage drop of the resistor 240, the port voltage becomes an intermediate voltage, that is, the port voltage is between a high level and a low level.

[0062] like Figure 6 As shown, Figure 6 The attachment-side identification module 130 has seven first signal output terminals 210 , five of which are in the first connection state, one is in the second connection state, and one is in the third connection state.

[0063] In one embodiment of the present application, the third signal input terminal of the control module 300 is connected to the output terminal of the key switch of the forklift 100 .

[0064] In this embodiment, the key switch state of the forklift 100 is detected by the third signal input terminal of the control module 300. When the control module 300 detects that the key switch is closed and the forklift 100 is powered on, the control module 300 sends an identification signal through the second signal output terminal 230 to identify the attachment 120.

[0065] In addition, an embodiment of the present application discloses a forklift 100 including the attachment identification device as described above.

[0066] The forklift 100 provided in the embodiment of the present application can implement each process implemented in the above method embodiment and achieve the same beneficial effects. To avoid repetition, they will not be described again here.

[0067] In addition, an embodiment of the present application discloses an accessory identification method, which is applied to the accessory identification device as described above. Figure 7 As shown, the method includes but is not limited to step S100, step S200 and step S300.

[0068] Step S100: When the attachment 120 is installed on the boom 110, an identification signal is sent to the first signal input terminal 200 through the second signal output terminal 230, so that based on the port connection state of the first signal output terminal 210, the port voltage of the second signal input terminal 220 correspondingly connected to the first signal output terminal 210 is changed. Since the port connection state of at least one first signal output terminal 210 of any two attachment-side identification modules 130 is different, under the action of the identification signal, the port voltage of at least one second signal input terminal 220 of any two boom-side identification modules 140 is different.

[0069] In this step, since the first signal input terminal 200 inputs the identification signal, if the port connection status of the first signal output terminal 210 is different, the port voltage of the corresponding second signal input terminal 220 is also different.

[0070] Step S200: obtaining port voltages of a plurality of second signal input terminals 220;

[0071] Step S300 : confirming the type of the accessory 120 according to the port voltages of the second signal input terminals 220 .

[0072] In this step, since the port voltage of at least one second signal input terminal 220 of any two arm side identification modules 140 is different, based on the multiple port voltages of the multiple second signal input terminals 220 of the predetermined multiple arm side identification modules 140 under the action of the identification signal, the corresponding accessory 120 type can be determined according to the multiple port voltages of the multiple second signal input terminals 220 of the type of accessory 120 to be identified.

[0073] In this embodiment, when the attachment 120 is installed on the boom 110, an identification signal is sent to the first signal input terminal 200 through the second signal output terminal 230, so that based on the port connection state of the first signal output terminal 210, the port voltage of the second signal input terminal 220 corresponding to the first signal output terminal 210 is changed. Since the port connection state of at least one first signal output terminal 210 of any two attachment-side identification modules 130 is different, for any two attachment-side identification modules 130, the port voltage of at least one second signal input terminal 220 of the control module 300 is different. Further, the port voltages of the multiple second signal input terminals 220 are obtained, and then the type of the attachment 120 can be confirmed according to the port voltages of the multiple second signal input terminals 220. Compared with the traditional attachment 120 identification technology, the attachment identification method of the embodiment of the present application is not easily affected by the environment, and can accurately identify the type of the attachment 120, so as to match the corresponding load diagram.

[0074] According to some embodiments of the present application, the port connection state of the first signal output terminal 210 is any one of a first connection state and a second connection state, the first connection state is a state in which the first signal input terminal 200 is connected to the first signal output terminal 210, and the second connection state is a state in which the first signal input terminal 200 is disconnected from the first signal output terminal 210.

[0075] The step S100 of “sending an identification signal to the first signal input terminal 200 through the second signal output terminal 230 so as to change the port voltage of the second signal input terminal 220 correspondingly connected to the first signal output terminal 210 based on the port connection state of the first signal output terminal 210” includes but is not limited to step S110.

[0076] Step S110: Send an identification signal to the first signal input terminal 200 through the second signal output terminal 230, so that the port voltage of the first target input terminal is a high level, and the port voltage of the second target input terminal is a low level, the first target input terminal is: the second signal input terminal 220 connected to the first target output terminal, the first target output terminal is: the first signal output terminal 210 in the first connection state, the second target input terminal is: the second signal input terminal 220 connected to the second target output terminal, and the second target output terminal is: the first signal output terminal 210 in the second connection state.

[0077] In this embodiment, the control module 300 sends an identification signal through the second signal output terminal 230, and the identification signal is a high-level signal. If the first signal output terminal 210 is in the first connection state, the identification signal passes through the first signal input terminal 200, the first signal output terminal 210 to the corresponding second signal input terminal 220 in sequence, so that the port voltage of the corresponding second signal input terminal 220 changes, that is, the port voltage becomes a high level. If the first signal output terminal 210 is in the second connection state, since the first signal input terminal 200 and the first signal output terminal 210 are disconnected, the identification signal cannot be input to the corresponding second signal input terminal 220, so the port voltage of the corresponding second signal input terminal 220 is a low level.

[0078] According to an embodiment of the present application, “confirming the type of the accessory 120 according to the port voltages of the plurality of second signal input terminals 220 ” in step S300 includes but is not limited to step S310 , step S320 , step S330 and step S340 .

[0079] Step S310: sorting the port voltages of the plurality of second signal input terminals 220 based on the port sequence of the plurality of second signal input terminals 220 to obtain a target voltage sequence;

[0080] In this step, the port voltage of the second signal input terminal 220 is at a high level or a low level. The port voltages of the plurality of second signal input terminals 220 are sorted according to the port sequence of the plurality of second signal input terminals 220 to obtain a target voltage sequence.

[0081] Step S320: based on the high and low levels of the multiple port voltages in the target voltage sequence, convert the target voltage sequence into a binary number to obtain a target binary number;

[0082] In this step, based on the high and low levels of multiple port voltages in the target voltage sequence, the target voltage sequence is converted into a binary number, the high level is converted into a digital 1, and the low level is converted into a digital 0, to obtain a target binary number. Different types of accessory side identification modules 130 correspond to different binary numbers.

[0083] Step S330: obtaining a first numerical type mapping relationship, where the first numerical type mapping relationship is a correspondence relationship between a plurality of binary numbers and a plurality of types of attachments 120;

[0084] In this step, the first value type mapping relationship is: a correspondence between a plurality of binary numbers and a plurality of types of accessories 120 predetermined according to the identification signal and the port connection status of the first signal output terminal 210 of each accessory-side identification module 130 .

[0085] Step S340: Determine the type of the attachment 120 according to the mapping relationship between the target binary number and the first numerical type.

[0086] In this embodiment, the port voltages of the multiple second signal input terminals 220 of the arm side identification module 140 are converted into digital 1 or digital 0 in sequence to obtain a target binary number, and then the type of the accessory 120 to be identified is determined based on the first numerical type mapping relationship and the target binary number.

[0087] It is understandable that if Figure 5 As shown, the binary number corresponding to the port voltage of the plurality of second signal input terminals 220 of the arm side identification module 140 is 0111111, and the type of the attachment 120 to be identified can be determined according to the mapping relationship between 0111111 and the first numerical type. The seven-bit binary number can match the types of multiple attachments 120. Figure 4 As shown, the binary number corresponding to the port voltage of the multiple second signal input terminals 220 of the boom-side identification module 140 is 1111111.

[0088] In one embodiment of the present application, the port connection state of the first signal output terminal 210 is any one of a first connection state, a second connection state and a third connection state. The first connection state is a state in which the first signal input terminal 200 is connected to the first signal output terminal 210 through a wire, the second connection state is a state in which the first signal input terminal 200 is disconnected from the first signal output terminal 210, and the third connection state is a state in which the first signal input terminal 200 is connected to the first signal output terminal 210 through a resistor 240.

[0089] The step S100 of “sending an identification signal to the first signal input terminal 200 through the second signal output terminal 230 so as to change the port voltage of the second signal input terminal 220 correspondingly connected to the first signal output terminal 210 based on the port connection state of the first signal output terminal 210” includes but is not limited to step S120.

[0090] Step S120: Send an identification signal to the first signal input terminal 200 through the second signal output terminal 230, so that the port voltage of the first target input terminal is a high level, the port voltage of the second target input terminal is a low level, and the port voltage of the third target input terminal is an intermediate voltage, the intermediate voltage is a voltage between the high level and the low level, the first target input terminal is: the second signal input terminal 220 connected to the first target output terminal, the first target output terminal is: the first signal output terminal 210 in the first connection state, the second target input terminal is: the second signal input terminal 220 connected to the second target output terminal, the second target output terminal is: the first signal output terminal 210 in the second connection state, the third target input terminal is: the second signal input terminal 220 connected to the third target output terminal, and the third target output terminal is: the first signal output terminal 210 in the third connection state.

[0091] In this embodiment, the control module 300 sends an identification signal through the second signal output terminal 230, and the identification signal is a high-level signal. If the first signal output terminal 210 is in the first connection state, the identification signal passes through the first signal input terminal 200, the first signal output terminal 210 to the corresponding second signal input terminal 220 in sequence, so that the port voltage of the corresponding second signal input terminal 220 changes, that is, the port voltage becomes a high level. If the first signal output terminal 210 is in the second connection state, since the first signal input terminal 200 and the first signal output terminal 210 are disconnected, the identification signal cannot be input to the corresponding second signal input terminal 220, so the port voltage of the corresponding second signal input terminal 220 is a low level. If the first signal output terminal 210 is in the third connection state, the identification signal passes through the first signal input terminal 200, the resistor 240 and the first signal output terminal 210 to the corresponding second signal input terminal 220 in sequence, so that the corresponding port voltage changes, and due to the voltage drop of the resistor 240, the port voltage becomes an intermediate voltage, that is, the port voltage is between a high level and a low level.

[0092] In one embodiment of the present application, “confirming the type of the accessory 120 according to the port voltages of the plurality of second signal input terminals 220 ” in step S300 includes but is not limited to step S350 , step S360 , step S370 and step S380 .

[0093] Step S350: sorting the port voltages of the plurality of second signal input terminals 220 based on the port sequence of the plurality of second signal input terminals 220 to obtain a target voltage sequence;

[0094] In this step, the port voltage of the second signal input terminal 220 is a high level, a low level or an intermediate voltage. The port voltages of the plurality of second signal input terminals 220 are sorted according to the port sequence of the plurality of second signal input terminals 220 to obtain a target voltage sequence.

[0095] Step S360: based on the voltage magnitudes of the multiple port voltages in the target voltage sequence, convert the target voltage sequence into a ternary number to obtain a target ternary number;

[0096] In this step, based on the high and low levels of multiple port voltages in the target voltage sequence, the target voltage sequence is converted into a ternary number, the high level is converted into the number 2, the low level is converted into the number 0, and the intermediate voltage is converted into the number 1, to obtain the target ternary number. Different types of accessory side identification modules 130 correspond to different ternary numbers.

[0097] Step S370: obtaining a second numerical type mapping relationship, where the second numerical type mapping relationship is a correspondence relationship between a plurality of ternary numbers and a plurality of types of attachments 120;

[0098] In this step, the second value type mapping relationship is: a correspondence between a plurality of predetermined ternary numbers and a plurality of types of accessories 120 according to the identification signal and the port connection status of the first signal output terminal 210 of each accessory-side identification module 130 .

[0099] Step S380: Determine the type of the attachment 120 according to the mapping relationship between the target ternary number and the second numerical type.

[0100] In this embodiment, the port voltages of the multiple second signal input terminals 220 of the arm side identification module 140 are converted into numbers 0, 1, and 2 in sequence to obtain a target ternary number, and then the type of the accessory 120 to be identified is determined based on the first numerical type mapping relationship and the target ternary number.

[0101] It is understandable that if Figure 6 As shown, the binary number corresponding to the port voltage of the plurality of second signal input terminals 220 of the arm side identification module 140 is 1022222, and the type of the attachment 120 to be identified can be determined according to the mapping relationship between 1022222 and the first numerical type. The seven-digit ternary number can match various types of attachments 120.

[0102] It is understandable that the state type of the port connection state of the first signal output terminal 210 can be increased so that the port voltage of the second signal input terminal 220 can be a variety of different voltages under the identification signal, which can be converted into corresponding values ​​in other bases to distinguish different types of accessories 120.

[0103] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. An attachment identification device, applied to a forklift, wherein the forklift has a boom and a plurality of different types of attachments, wherein the attachments are used to be installed on the boom, and wherein: The device includes: A plurality of accessory side identification modules, wherein the plurality of accessory side identification modules are used to be respectively arranged on different types of accessories, each of the accessory side identification modules has a first signal input terminal and a plurality of first signal output terminals, and at least one of the first signal output terminals of any two of the accessory side identification modules has a different port connection state, and the port connection state is: a connection state between the first signal output terminal and the first signal input terminal in the same accessory side identification module; A boom side identification module, which is used to be set on the boom, and the boom side identification module includes a control module, and the control module has a second signal output terminal and multiple second signal input terminals. When the accessory is installed on the boom, the second signal output terminal is connected to the first signal input terminal, and the multiple second signal input terminals are correspondingly connected to the multiple first signal output terminals, so as to send an identification signal to the first signal input terminal through the second signal output terminal, so that based on the port connection state of the first signal output terminal, the port voltage of the second signal input terminal correspondingly connected to the first signal output terminal is changed.

2. The attachment identification device according to claim 1, characterized in that: The port connection state of the first signal output end is any one of a first connection state and a second connection state, the first connection state is: a state in which the first signal input end is connected to the first signal output end, and the second connection state is: a state in which the first signal input end is disconnected from the first signal output end.

3. The attachment identification device according to claim 1, characterized in that: The port connection state of the first signal output end is any one of a first connection state, a second connection state and a third connection state, the first connection state is a state in which the first signal input end and the first signal output end are connected through a wire, the second connection state is a state in which the first signal input end and the first signal output end are disconnected, and the third connection state is a state in which the first signal input end and the first signal output end are connected through a resistor.

4. The attachment identification device according to claim 1, characterized in that: The third signal input terminal of the control module is connected to the output terminal of the key switch of the forklift.

5. A forklift, characterized in that: It comprises the accessory identification device as described in any one of claims 1 to 4.

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