WO2013082972A1

WO2013082972A1 - Discrete input apparatus, discrete input design method and detection method

Info

Publication number: WO2013082972A1
Application number: PCT/CN2012/082353
Authority: WO
Inventors: 詹纯新; 刘权; 郭纪梅; 蒋应龙; 奉松生; 陈海霞; 彭佳
Original assignee: 中联重科股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-12-08
Filing date: 2012-09-28
Publication date: 2013-06-13
Also published as: CN102522973A

Abstract

The present invention relates to a discrete input apparatus, a discrete input design method and a discrete input detection method. The apparatus comprises an electronic control unit and multiple switches. The electronic control unit comprises multiple input/output ports. N ports of the input/output ports are defined as input ports, and additional M ports are defined as output ports. The switches comprise N groups, and each group has M switches. First ends of the M switches in each group are respectively connected to the M output ports, and second ends are joined together in a parallel manner, so as to be connected to one of the N input ports. The electronic control unit is configured in a manner of: the M output ports simultaneously outputting a specific potential, detecting the N input ports to determine whether one of the switches is triggered, and after it is determined that a switch is triggered, the M output ports successively outputting a specific potential, and detecting the N input ports to determine the triggered switch. In the present invention, discrete inputs are connected into a matrix, and line-by-line scanning is adopted to identify the triggered switch, which dramatically improves the discrete input capability of a control system.

Description

Switch input device, switching input design method and detection method

The invention relates to a switch quantity input detecting device, in particular to a switch quantity input device, a switching amount input design method and a detecting method. Background technique

In recent years, with the construction demand and the increasing degree of intelligentization of construction machinery, the control system function of construction machinery has increased the input quantity and detection quantity, the module division is more refined, and the control effect is more refined. The ever-increasing amount of input control requires an increase in the number of input/output (I/O) ports of the electronic control unit for construction machinery. In fact, once an electronic control unit is selected, the number of input/output ports has been determined and cannot be increased arbitrarily. Therefore, in practice, the input/output port is often insufficient, and a more powerful and expensive electronic control unit is re-selected. If this problem occurs during the performance improvement stage of a mature product, it often takes a lot of work to re-select, redesign, program and debug, and it takes a lot of manpower and material resources.

As shown in FIG. 1, the switches S11, S21, ..., SM1 are connected to the electronic control unit 210 through wires, and there are M switches, which require M wires and occupy the input port of the electronic control unit 210; that is, the switch S11, S21, ..., SM1 are directly connected to the input port of the electronic control unit 210, and there is no optimization. The electronic control unit 210 controls the execution of the internal program based on the states of the read switches S11, S21, ..., SM1. The number of input ports of the electronic control unit 210 is limited. When a control system requires more switches, the input port of an electronic control unit 210 often fails to meet the demand.

In order to solve the problem of insufficient input port of the electronic control end element, the prior art has proposed to expand the input quantity of the switch quantity by another electronic input unit through the bus. As shown in Figure 2, switch S11, S21, ···, the SMI is connected to the electronic input unit 320 through a wire, and there are M switches, and there are M wires. The electronic input unit 320 and the electronic control unit 310 are connected by a bus. The electronic input unit 320 reads in the states S11, S21, ..., SM1 of the respective switches, and then transmits the states of the switches S11, S21, ..., SM1 to the electronic control unit 310 via the bus. The electronic control unit 310 controls the execution of the internal program based on the states of the respective switches S11, S21, ..., SM1 obtained from the bus. However, an additional electronic input unit 320 is added to Fig. 2, which brings about an increase in cost, and one more component has an additional point of failure, increasing the probability of error. Summary of the invention

Accordingly, the present invention provides a digital input device, a digital input design method, and an inspection method, which have the drawbacks of the prior art and increase the number of inputs of the switching amount.

Specifically, a digital input device according to an embodiment of the present invention includes an electronic control unit and a plurality of switches. The electronic control unit includes a plurality of input/output ports. N of the input/output ports are defined as input ports, and the other M are defined as output ports; M and N are positive integers greater than 1. The switch is divided into N groups and each group has M, and the first ends of the M switches in each group are electrically connected to the M output ports respectively, and the second ends are connected together with the N A corresponding one of the input ports is electrically connected. In addition, the electronic control unit is configured to: simultaneously output a specific potential from the M output ports and detect the N input ports to determine whether a switch is triggered in the switch, and determine that a switch is triggered The specific potentials are sequentially output from the M output ports and the N input ports are detected to determine the triggered switch.

In other embodiments, the other Y of the above input/output ports may also be defined as a second input port, each of the Y second input ports being electrically connected only to a single switch, Y being a positive integer.

A method for designing a digital input according to an embodiment of the present invention includes the steps of: determining a degree of importance of a plurality of switches for providing a digital input; and making a single high importance of the switch The switch is electrically connected to a first input port of an electronic control unit; and grouping the plurality of switches having a low degree of importance in the switch, and electrically connecting the plurality of switches in each group to the electronic control unit a second input port and electrically connected to the plurality of output ports of the electronic control unit, respectively.

Another embodiment of the present invention provides a digital input device that includes an electronic control unit and a plurality of switches. The electronic control unit includes N input ports and M output ports, wherein the N input ports are respectively electrically connected to the N first wires, and the M output ports are respectively electrically connected to the M second wires, M N is a positive integer greater than one. Either one of the N first wires is electrically connected to the M second wires through the M switches in the switch, and any one of the M second wires passes through the N in the switch The switches are electrically connected to the N first wires, respectively, to form a binary input matrix.

In other embodiments, the electronic control unit may further include at least one second input port, any one of the second input ports being electrically connected only to a single switch.

A method for detecting a digital input according to an embodiment of the present invention is suitable for performing the above-mentioned digital input device, comprising the steps of: simultaneously providing a specific potential to the M second wires via the M output ports And detecting a potential of the N input ports to obtain a first detection result; determining, according to the first detection result, whether a switch is triggered; when determining that a switch is triggered, sequentially providing the M output ports Deriving a potential to the M second wires and detecting potentials of the N input ports to obtain a second detection result; and determining the triggered switch according to the second detection result. Among them, the specific potential is, for example, a high potential.

In short, the embodiment of the present invention connects the digital input into a matrix form, and uses a progressive scan method to identify the triggered switch, thereby greatly improving the input capability of the switching amount of the control system, and solving the problem caused by insufficient input port. The problem of changing the type of electronic control unit.

The above description is only an overview of the technical solutions of the present invention, and the technical means of the present invention can be more clearly understood, and can be implemented in accordance with the contents of the specification, and the above and other objects, features and advantages of the present invention can be more clearly understood. The following is a preferred embodiment and is accompanied by The figure is described in detail below. DRAWINGS

1 is a schematic structural view of a digital input device in the prior art.

2 is a schematic structural view of another type of digital input device in the prior art.

FIG. 3 is a schematic structural diagram of a digital input device according to an embodiment of the present invention. detailed description

In order to further explain the technical means and effectiveness of the present invention for achieving the intended purpose of the invention, the following describes the digital input device, the digital input design method and the detection method according to the present invention with reference to the accompanying drawings and preferred embodiments. The embodiments, methods, steps and effects are described in detail below.

The foregoing and other technical aspects, features and advantages of the present invention will be apparent from the following description of the preferred embodiments of the invention. The technical means and functions of the present invention for achieving the intended purpose can be more deeply and specifically understood by the description of the embodiments. However, the drawings are only for reference and description, and are not intended to be used for the present invention. limit.

Please refer to FIG. 3 , which is a schematic structural diagram of a digital input device 100 according to an embodiment of the invention. As shown in FIG. 3, the digital input device 100 includes a plurality of switches SA1, SB1 and S11, S21, SMN and an electronic control unit 110 for providing a digital input; each switch includes a first end 101 and a second end. 102 and the control terminal (not shown). Among them, the switch input related to the construction safety performance is rated as the importance level, such as the input of the switch SA1; the control system has good follow-up, and the input of the switch requiring high real-time is set to the importance level, such as the switch SB1. The input of the rest is not high, and the switch input with less security relationship is rated as three levels of importance, such as the inputs of switches S11, S21, SMN. For the digital input with three levels of importance, use the matrix scanning input method to widen the number of digital inputs. The importance is first-level and second-level. The digital input does not use the matrix scanning input method.

In FIG. 3, the (N+2) input/output (I/O) ports at the left end of the electronic control unit 110 are defined as input ports, the high potential input is valid, and the M input/output port definitions at the right end are defined. For the output port, and correspondingly high output effective; M, N are positive integers greater than 1. The M output ports of the electronic control unit 110 are electrically connected to the wires CI, C2, ···, CM, and the N input ports are respectively electrically connected to the wires R1, R2, ···, RN and the other two input ports are electrically connected to the wires respectively. XI and X2.

For switches SA1, SB1 whose importance is high (for example, primary, secondary), the first end 101 receives a fixed potential, for example electrically connected to a supply voltage or may be connected to another of the electronic control unit 110 or Two output ports; the second ends 102 are electrically connected to the wires XI and X2, respectively. When a switch is triggered in the switches SA1, SB1, it can be directly determined by detecting the potential of each input port of the electronic control unit 10 electrically connected to the wires XI and X2.

For switches S11, S21, ..., SMN: It is divided into N groups, each group has M. For example, the first group is composed of M switches S11, S21, SM1, the first group is composed of M switches S12, S22, SM2, and the Nth group is composed of M switches S1N, S2N, ..., SMN. Moreover, the first ends 101 of the M switches in each group are electrically connected to the wires CI, C2, . . . , CM, respectively, and the second ends 102 are connected together with the wires R1, R2, ···, RN. One of the corresponding ones is electrically connected. In other words, any one of the wires R1, R2, ···, RN (for example, RN) is electrically connected to the wires CI, C2, ···, CM through M switches (for example, SIN, S2N, SMN), and the wire CI , C2, ···, any one of the CMs (for example, CM) is electrically connected to the wires R1, R2, . . . , RN through N switches (eg, SM1, SM2, SMN) to form an MX N switch. Input matrix.

For identifying whether the switch S11, S21, SMN in the MX N switch input matrix is triggered, the progressive scan mode is adopted. The specific steps may be: First, it is determined whether a switch is triggered in the M XN switch input matrix. The M output ports of the electronic control unit 110 simultaneously output a specific potential, for example, a high potential, to the wires C1, C2, *··, ,, and input the wires R1, R2, ···, RN at one input port. Detection, as long as the wires Rl, R2, ···, RN are detected If there is a high potential input on any one, it means that M XN switches S11, S21, SMN have switches activated, and the triggered switches are located in the group of switches with high potential input.

After that, after judging that a switch is triggered, the specific position determining process of the triggered switch can be entered. That is, after the switch is judged to be triggered, the delay is for a period of time (if the cycle period of the program is long, the delay program may not be executed), and during the delay period, the M output ports of the electronic control unit 110 are sequentially The wires C1, C2, and Μ output a high potential. For example, when one of the wires C1, C2, -, CM is high, the other wires are low. Then, the potentials of the wires R1, R2, ···, RN are detected at the N input ports. When one of the wires R1, R2, ···, RN is at a high potential, it is judged that the wire is at the intersection of the wire CI, C2, ···, and the CM is placed at a high potential. under. For example, when the wire CM is set to a high potential, it is detected that the wire RN is high, and it can be determined that the switch SMN at the intersection of the wire CM and the wire RN is triggered.

In addition, it can be understood that, after determining that a switch is triggered, it is also possible to design that it is not necessary to perform potential detection on all N input ports electrically connected to the wires R1, R2, . . . , RN, respectively. For example, when it is detected that M switches SIN, S2N, and SMN are electrically connected to the wire RN, a switch is triggered, and in the process that the wires CI, C2, ···, CM are sequentially set to a high potential, only detection is required. The input port electrically connected to the wire RN can also determine the specific position of the triggered switch.

The following takes the 4 X 4 switch input matrix (that is, the values of M and N are all 4) as an example. The details are as follows:

After detecting that a switch is triggered, the electronic control unit 110 delays for a period of time, and in the delay time period, the potential combinations on the wires C1, C2, C3, and C4 are sequentially: "1000", "0100", 0010", "0001"; where "0" represents a low potential, "Γ represents a high potential. The electronic control unit 110 reads the potential on the wires R1, R2, R3, R4, if on the wires Cl, C2, C3, C4 When the potential combination is 'Ό100', the potential on the sense line R2 is high, and it can be judged that the switch S22 at the intersection of the line R2 and the line C2 set to the high potential is triggered.

The embodiment of the present invention changes the switch by changing the wiring mode without changing the hardware. The input identification method increases the number of inputs of the switch. Taking the 4 X4 switching input matrix as an example, the same 8 input/output ports have 8 wires, and the embodiment of the present invention can realize 4x4=16 switching inputs. Moreover, as the number of matrix rows and columns increases, the increase in the number of digital inputs is more pronounced. The embodiment of the invention can conveniently solve the problem of upgrading and changing the electronic control component caused by the shortage of the digital input port, and the upgrading of the engineering machinery product control system is easier, more convenient for maintenance, and cost saving.

Furthermore, formal variations based on the same progressive scan principle are still within the scope of protection of the present invention. For example, the input and output ports form a new circuit form by a combination of pull-up or pull-down resistors and port high-low-function functions.

In addition, from the description of the foregoing embodiments of the present invention, the steps of the digital input design method proposed by the embodiment of the present invention are as follows: determining the importance of the plurality of switches for providing the digital input; making the importance of the switch Electrically connecting a first input port of the electronic control unit (eg, one of the input ports electrically coupled to the leads XI and X2) for a single high switch; and grouping the plurality of switches of the switch with a low degree of importance, and Electrically connecting a plurality of switches in each group to one of a plurality of second input ports of the electronic control unit (eg, one of N input ports electrically coupled to wires R1, R2, . . . , RN, respectively) And electrically connected to a plurality of output ports of the electronic control unit (for example, M output ports electrically connected to the wires CI, C2, . . . , CM respectively).

Furthermore, the description of the above embodiment of the present invention can be summarized as follows: The steps of the method for detecting the digital input of the present invention are as follows: simultaneously providing a specific potential to the M second wires via the M output ports (for example, the wire CI) , C2, ···, CM) and detecting potentials of N input ports (for example, input ports electrically connected to the wires R1, R2, . . . , RN respectively) to obtain a first detection result; determining according to the first detection result Whether a switch is triggered; when it is determined that a switch is triggered, sequentially providing the specific potential to the M second wires via the M output ports and detecting the potential of the N input ports to obtain a second detection a result; and determining a specific location of the triggered switch based on the second detection result.

The above description is only a preferred embodiment of the present invention, and is not in any form of the present invention. The present invention has been disclosed in the above preferred embodiments, but is not intended to limit the present invention. Any one skilled in the art can make use of the above disclosed technical contents without departing from the scope of the present invention. The invention is not limited to the equivalent embodiment, but any simple modifications, equivalent changes and modifications made to the above embodiments in accordance with the technical spirit of the present invention are still present in the present invention without departing from the technical scope of the present invention. Within the scope of the inventive solution.

Claims

Rights request

A switch input device comprising an electronic control unit and a plurality of switches, the electronic control unit comprising a plurality of input/output ports, wherein

N of the input/output ports are defined as input ports and the other M are defined as output ports, and both M and N are positive integers and greater than 1;

The switch is divided into N groups and each group is M. The first ends of the M switches in each of the N groups are electrically connected to the M output ports respectively, and the second end is connected in parallel. Electrically connected to one of the N input ports; and

The electronic control unit is configured to: simultaneously output a specific potential from the M output ports and detect the N input ports to determine whether a switch is triggered in the switch, and after determining that a switch is triggered The M output ports sequentially output the specific potential and detect the N input ports to determine a triggered switch.

2. The digital input device of claim 1, wherein the other Y of the input/output ports are defined as a second input port, and each of the Y second input ports is only A single switch is electrically connected and Y is a positive integer.

3. A method for designing a digital input, characterized in that it comprises the steps of:

Determining the importance of a plurality of switches for providing a digital input;

Equivalently connecting a single switch of the switch with a high degree of importance to a first input port of an electronic control unit;

Grouping a plurality of switches having a low degree of importance in the switch, and electrically connecting a plurality of switches in each group to a same second input port of the electronic control unit and electrically connected to the electronic control respectively Multiple output ports of the unit.

4. A digital input device comprising an electronic control unit and a plurality of switches, the characteristics thereof Yes,

The electronic control unit includes N input ports and M output ports, the N input ports are respectively electrically connected to the N first wires, and the M output ports are respectively electrically connected to the M second wires, M N is a positive integer greater than 1;

Either one of the N first wires is electrically connected to the M second wires through the M switches in the switch, and any one of the M second wires passes through the N in the switch The switches are electrically connected to the N first wires, respectively, to form a binary input matrix.

5. The digital input device of claim 4, wherein the electronic control unit further comprises at least one second input port, any one of the second input ports being electrically connected only to a single switch.

A method of detecting a digital input, the digital input device of claim 4, comprising the steps of:

Providing a specific potential to the M second wires via the M output ports and detecting the potentials of the N input ports to obtain a first detection result;

Determining, according to the first detection result, whether a switch is triggered;

When it is determined that a switch is triggered, sequentially providing the specific potential to the M second wires via the M output ports and detecting potentials of the N input ports to obtain a second detection result;

The triggered switch is determined according to the second detection result.