CN102829939B - Circuit system, engineering machine and water inlet identification method - Google Patents

Abstract

The present invention provides a circuit system, including a sensor, a connector, a detection unit and a controller, the sensor is connected to the controller through the connector, and the detection unit is used to detect electrical signals at the connector and/or at the controller, And send the detected electrical signal to the controller; the controller is used to determine that the water inflow at the connector exceeds the standard when the value of the electrical signal is within the preset value range, and to issue an alarm and/or limit the action to prevent accidents. occur. The invention also provides an engineering machine and a method for identifying water inflow. The technical solution provided by the invention is simple to operate, can detect signal distortion caused by water ingress in time, and ensures operation safety.

Description

Circuit system, engineering machinery and identification method for water ingress

technical field

The invention relates to the field of engineering machinery, in particular to a circuit system, a construction machine including the circuit system, and a method for identifying water ingress.

Background technique

At present, the operating environment of construction machinery is harsh, often exposed to dust and water vapor, and continuous work for a long time can easily cause aging of the line and equipment failure; The car wiring harness, connectors, and cavity form water, and when the equipment is restarted, it will short-circuit immediately, or cause signal instability or false signals, especially when false signals related to safety appear, which can easily cause In the event of accidents, at present, rubber seals and mechanical seals are often used in the industry to prevent water from entering electrical wiring harnesses, connectors and other components.

In related technologies, there is a multi-purpose intelligent security guard, which can detect signal changes online, and issue alarms and related action processing. The smart security is mainly used in safes, car anti-theft and other fields. In the literature with the patent number "CN200310115176", more related information can also be found.

Contents of the invention

The technical problem to be solved by the present invention is to provide a circuit system that can detect the water ingress of the connectors in the circuit in real time, and make alarms or action restrictions according to the water ingress to prevent accidents.

In view of this, the present invention provides a circuit system, including a sensor, a connector and a controller, the sensor is connected to the controller through the connector, the circuit system also includes a detection unit, the detection The unit is used to detect the electrical signal at the connector and/or at the controller, and send the detected electrical signal to the controller; the controller is used to determine the value of the electrical signal If it is within the preset value range, it is determined that the water inflow at the connector exceeds the standard, and an alarm and/or action limitation is performed.

This solution can detect the electrical signal at the connector and/or the controller in real time, and compare the electrical signal with the corresponding electrical signal under normal working conditions, and can promptly remind the user whether the detected part has water ingress, and whether the detected part After the water inflow of the detected part is determined to exceed the standard, an alarm and/or action limit is implemented to prevent accidents.

In the above technical solution, preferably, the controller further determines the priority of the circuit system, in the case that the priority of the circuit system is the first level and the value of the electrical signal is within a preset value range , the controller performs alarm and action limitation;

When the priority of the electrical circuit system is the second level and the value of the electrical signal is within a preset value range, the controller performs an alarm or action limitation.

In this technical solution, after the water enters the connector, targeted treatment is carried out according to the priority of the circuit system, which can avoid the loss caused by non-important circuit system failure shutdown, and ensure production safety. To improve the continuity of production.

In the above technical solution, preferably, when the priority of the circuit system is at the second level, the controller also determines the degree of water ingress at the connector, and when the value of the electrical signal is at the first level In the case of a preset value range, the controller issues an alarm; when the value of the electrical signal is in a second preset value range, the controller performs action restriction.

In this way, corresponding action processing can be performed according to the degree of water ingress at the connector to achieve more precise control.

Preferably, the electrical signal is the resistance value of the connector.

In this technical scheme, if water enters the connector in the circuit system, the resistance value of the connector will change accordingly, and the detection unit collects the resistance value at the connector, and sends the resistance value to the controller, and the controller After judging that the water inflow at the connector exceeds the standard, an alarm and/or action limitation is performed.

Preferably, the electrical signal is a voltage value at both ends of the connector, a voltage value received by the controller, or a current value passing through the connector and the controller.

In this technical scheme, if water enters the connector in the circuit system, the current value in the circuit system, the voltage value at both ends of the connector or the voltage value received by the controller will change accordingly, and the detection unit collects the and/or the electrical signal at the controller, the electrical signal is sent to the controller, and after the controller judges that the water inflow at the connector exceeds the standard, it will alarm and/or limit the action to prevent the occurrence of accidents.

In addition, the present invention also provides a construction machine, including the circuit system described in the above technical solution. Obviously, the construction machine has all the above-mentioned beneficial effects, and details will not be repeated here.

In addition, the present invention also provides a signal protection method, including the following steps:

Step 1, detecting electrical signals at the connector and/or at the controller;

Step 2, when the value of the electrical signal is within a preset value range, it is determined that the amount of water inflow at the connector exceeds the standard, and an alarm and/or action limitation is performed.

The technical solution provided by the invention can detect the electrical signal at the connector and/or the controller in real time, compare the electrical signal with the corresponding electrical signal under normal working conditions, and judge whether the water inflow at the connector exceeds the standard , after judging that the amount of water entering the detected part exceeds the standard, an alarm and/or action limitation is implemented to prevent accidents.

Preferably, the controller also determines the priority of the circuit system, and when the priority of the circuit system is the first level and the value of the electrical signal is within a preset value range, the controller performs Alarm and action limitation;

When the priority of the circuit system is the second level and the value of the electrical signal is within a preset value range, the controller will give an alarm or act.

After the water enters the connector, according to the priority of the circuit system in the whole equipment, it can be dealt with in a targeted manner, which can avoid the loss caused by the failure of the non-important circuit system, and ensure production safety. Possibly improve the continuity of production.

Preferably, when the priority of the circuit system is the second level, the controller also determines the degree of water ingress at the connector, and when the value of the electrical signal is within the first preset value range When the value of the electrical signal is within the second preset value range, the controller performs action limitation.

In this way, corresponding action processing can be performed according to the degree of water ingress at the connector to achieve more precise control.

Preferably, the electrical signal is the resistance value of the connector, the voltage value at both ends of the connector, the voltage value received by the controller, or the current passing through the connector and the controller value.

In this technical solution, if water enters the connector in the circuit system, the resistance value of the connector, the current value in the circuit system, the voltage value at both ends of the connector or the voltage value received by the controller will change accordingly, The detection unit collects the electrical signal at the connector and/or the controller, and sends the electrical signal to the controller. After the controller determines that the water inflow at the connector exceeds the standard, it will alarm and/or limit the action to prevent accidents happened.

In summary, the present invention provides a circuit system and a signal protection method, which can promptly remind the user whether there is water in the line and the size of the water inflow, and can achieve alarm and/or action limitation to prevent accidents. The structure is simple, Reliable performance significantly improves construction safety and reduces construction risks.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of the circuit system according to the present invention;

Fig. 2 is a block diagram of the structure shown in Fig. 1;

Fig. 3 is a schematic circuit diagram of the structure shown in Fig. 1;

Fig. 4 is a schematic structural diagram of an embodiment of the signal protection method according to the present invention.

The corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 4 is:

100 circuit systems, 1 sensor, 2 connectors, 3 controllers, 4 detection units.

detailed description

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways than described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

As shown in FIGS. 1 to 3 , the present invention provides a circuit system 100 , including a sensor 1 , a connector 2 and a controller 3 , the sensor 1 is connected to the controller 3 through the connector 2 , The circuit system 100 also includes a detection unit 4, the detection unit 4 is used to detect the electrical signal at the connector 2 and/or at the controller 3, and send the detected electrical signal to The controller 3; the controller 3 is used to determine that the water inflow at the connector 2 exceeds the standard when the value of the electrical signal is within a preset value range, and to issue an alarm and/or limit the action.

This solution can detect the electrical signal at the connector and/or the controller in real time, and compare the electrical signal with the corresponding electrical signal under normal working conditions, and can promptly remind the user whether the detected part has water ingress, and whether the detected part After the water inflow of the detected part is determined to exceed the standard, an alarm and/or action limit is implemented to prevent accidents.

As shown in FIG. 2, the controller also determines the priority of the circuit system, and when the priority of the circuit system is the first level and the value of the electrical signal is within a preset value range, the The controller performs alarm and action limitation;

When the priority of the electrical circuit system is the second level and the value of the electrical signal is within a preset value range, the controller performs an alarm or action limitation.

In this technical solution, after water enters the connector, targeted treatment is carried out according to the priority of the circuit system in the complete machine equipment, which can avoid the loss caused by non-important circuit system failure shutdown, and ensure production Under safe conditions, the continuity of production should be improved as much as possible.

In the above technical solution, preferably, when the priority of the circuit system is the second level, the controller 3 also determines the degree of water ingress at the connector 2, and when the value of the electrical signal is at In the case of the first preset value range, the controller 3 issues an alarm; when the value of the electrical signal is in the second preset value range, the controller 3 performs action restriction.

In this way, corresponding action processing can be performed according to the degree of water ingress at the connector to achieve more precise control.

Preferably, the electrical signal is the resistance value of the plug connector 2 .

In this technical scheme, if water enters the connector in the circuit system, the resistance value of the connector will change accordingly, and the detection unit collects the resistance value at the connector, and sends the resistance value to the controller, and the controller After judging that the water inflow at the connector exceeds the standard, an alarm and/or action limitation is performed to prevent accidents.

Preferably, the electrical signal is a voltage value at both ends of the connector 2 or a voltage value received by the controller 3 .

In this technical scheme, if water enters the connector in the circuit system, the voltage value at both ends of the connector in the circuit system or the voltage value received by the controller will change, and the detection unit collects the data at the connector and/or controls The voltage value at the device is sent to the controller. After the controller determines that the water inflow at the connector exceeds the standard, it will alarm and/or limit the action to prevent accidents.

Preferably, the electrical signal is a current value passing through the connector 2 and the controller 3 .

In this technical solution, if water enters the connector in the circuit system, the current value in the circuit system will change accordingly, and the detection unit collects the current value passing through the connector and the controller, and sends the current value to the controller. After the controller determines that the water inflow at the connector exceeds the standard, it will alarm and/or limit the action to prevent accidents.

In addition, the present invention also provides a construction machine, including the circuit system described in any of the above technical solutions.

Those skilled in the art should understand that in actual operation, there are many types of controllers with different control accuracy, and those skilled in the art can select the required controller according to specific conditions.

As shown in Figure 4, the present invention also provides a signal protection method, including the following steps:

Step 101, detecting electrical signals at the connector 2 and/or at the controller 3;

Step 103, when the value of the electrical signal is within a preset value range, it is determined that the water inflow at the connector 2 exceeds the standard, and an alarm and/or action limitation is performed.

This technical solution can detect the electrical signal at the connector and/or the controller in real time, compare the electrical signal with the corresponding electrical signal under normal working conditions, and judge whether the water inflow at the connector exceeds the standard. After the water inflow to the detected part exceeds the standard, an alarm and/or action limitation is implemented to prevent accidents.

Preferably, the controller 3 also determines the priority of the circuit system. When the priority of the circuit system is the first level and the value of the electrical signal is within a preset value range, the controller 3 Carry out alarm and action restriction;

When the priority of the circuit system is the second level and the value of the electrical signal is within a preset value range, the controller 3 performs an alarm or action restriction.

After the water enters the connector, according to the priority of the circuit system in the whole equipment, it can be dealt with in a targeted manner, which can avoid the loss caused by the failure of the non-important circuit system, and ensure production safety. Possibly improve the continuity of production.

In the above technical solution, preferably, when the priority of the circuit system is the second level, the controller 3 also determines the degree of water ingress at the connector 2, and when the value of the electrical signal is at In the case of the first preset value range, the controller 3 issues an alarm; when the value of the electrical signal is in the second preset value range, the controller 3 performs action restriction.

In this way, corresponding action processing can be performed according to the degree of water ingress at the connector to achieve more precise control.

Preferably, the electrical signal is the resistance value of the plug connector 2 .

In this technical scheme, if water enters the connector in the circuit system, the resistance value of the connector will change accordingly, and the detection unit collects the resistance value at the connector, and sends the resistance value to the controller, and the controller After judging that the water inflow at the connector exceeds the standard, an alarm and/or action limitation is performed to prevent accidents.

Preferably, the electrical signal is a voltage value at both ends of the connector 2 , a voltage value received by the controller 3 or a current value passing through the connector 2 and the controller 3 .

In this technical scheme, if water enters the connector in the circuit system, the current value in the circuit system, the voltage value at both ends of the connector or the voltage value received by the controller will change accordingly, and the detection unit collects the and/or the electrical signal at the controller, the electrical signal is sent to the controller, and after the controller judges that the water inflow at the connector exceeds the standard, it will alarm and/or limit the action to prevent the occurrence of accidents.

The following is the experimental data carried out by the inventor according to the technical solution of the present invention.

1. Test overview

Product Name: Twist lock proximity switch three-pin connector

2. Purpose of the test

The water ingress of the connector mistakenly sends a signal and the locked signal is output to the host controller. In order to prevent this phenomenon, the software judges whether the input signal has entered water or not. If water enters, an alarm signal will be sent to the host controller.

3. Test plan

Test item: water ingress software identification of connectors.

Test conditions: Separate the three-pin connector socket of the rotary lock proximity switch from the plug, and let tap water or rainwater soak into the socket.

Test principle: Multiplex the voltage signal of the AI channel through the DI channel to identify false signals.

Error signal range: 0.5 ~ 14.6V (threshold voltage) or slightly higher than 14.6V.

False signal discrimination mechanism: AI channel analog signal value is greater than 99 and less than 3890, and the corresponding voltage value of AI channel is greater than 0.5V and less than 19V.

Control strategy after false signal recognition: The controller sends an alarm signal of water ingress in the connector to the host controller, the host alarms, the corresponding action of the operating handle to control the machine is invalid (safety bypass is valid), and the action is restricted.

4. Test steps

1. Power on the machine and start the machine, and separate the socket and plug of the proximity switch three-pin connector;

2. Fill the water in the water pipe directly into the three-core socket;

3. Check whether there is a prompt of "machine connector water ingress alarm" on the display screen of the cab;

4. Do the machine twist-lock action when there is an alarm prompt, check whether the machine can perform the twist-lock operation, and record the actual situation;

5. Run the machine when there is an alarm prompt, check whether the machine can perform corresponding actions, and record the actual situation;

6. After all the verification actions are completed, drain the water from the connector container, wipe off the water droplets and check whether the alarm on the display is eliminated, whether the machine action is normal, and record the actual situation.

5. Test results and data analysis

After the machine detects a false signal of water ingress, it will output an alarm signal to the host controller with a delay of three seconds, and after receiving the alarm signal, the host controller will output an alarm signal to the display with a delay of two seconds;

When the water-ingress software of the rotary lock proximity switch connector is recognized, the corresponding rotary lock operation is performed on the machine. The machine cannot be twisted and locked, and the movement is restricted. The identification of the water-ingress software can play a protective role in safety protection;

When the water is drained from the connector socket, the machine detects no false signal of water ingress and then the alarm is released, and the host controller does not receive the false signal "machine connector water ingress alarm" is automatically eliminated.

In the case of the same type of connector, the same water intake at the connector, and different water quality, the AI channel signal value multiplexed from the machine controller to monitor the twistlock signal DI (switch input) point is shown in Table 1 below.

The analog signal and voltage value of the AI channel multiplexed by the DI channel can identify the general scope of the water quality entering the connector, and judge whether it is a normal signal. If it is an error signal, it will restrict the machine's action to achieve safety protection. role.

As shown in Figure 1 and Figure 3, the influence of water ingress on electrical signals is explained by taking the example of the voltage of the power supply E being 24V. In the case of ignoring the equipment accuracy and system error, when the voltage value received by the controller changes between 0 and 0.5V due to water entering the connector, it has no effect on the circuit system, and the circuit system does not deal with it.

According to the above test results, when the water quality is rainwater, the preset value range can be set in Table 2 and Table 3. Table 2 is an embodiment of setting the preset value range for the circuit system with the second priority. Table The third is an embodiment of setting a preset value range for a circuit system with a priority of the first level.

In Figure 3, the connector is composed of a plug and a socket, and the switch K is a sensor. When the switch is closed, since the connector acts as a wire, its resistance can be ignored, so the voltage received by the controller is the power supply voltage 24V ;

When the connector is flooded, the resistance at the connector increases, and a part of the voltage is divided, which in turn causes the voltage received by the controller to vary between 0 and 24V.

Table I

water quality type AI channel analog signal value AI channel corresponding voltage value tap water 600～800 2.93～3.90 rainwater 960～1100 4.68～5.37 brine 3600～4000 17.58～19.53 no water 0～1 0

Table II

Connector water intake V(ml) The voltage value U(V) received by the controller Excuting an order 1<V≤2 20≤U≤23.5 Call the police 2<V 0<U<20 movement restriction

Table three

Connector water intake V(ml) The voltage value U(V) received by the controller Excuting an order 1<V 0<U<23.5 Alarms and Action Limits

For example, when the actual voltage value received by the controller is 23.6V, regardless of the priority of the circuit system in the whole machine, the voltage value is within the error range. At this time, the amount of water in the connector has no effect on the circuit system. impact, the circuit system does not deal with it.

When the actual voltage value received by the controller is 21V, it exceeds the error range. At this time, the water inflow in the connector has already interfered with the circuit system. If the priority of the circuit system in the whole machine is the second level, If the value of the voltage value is in the first preset value range, the circuit system performs alarm processing; if the priority of the circuit system in the whole machine is the first level, the circuit system performs alarm and action limitation, thereby achieving the purpose of safety protection.

When the actual voltage value received by the controller is 19V, it is beyond the error range. At this time, the water inflow in the connector has seriously interfered with the circuit system. If the priority of the circuit system in the whole machine is the second level , the value of the voltage value is in the second preset value range, and the circuit system will limit the action; if the priority of the circuit system in the whole machine is the first level, the circuit system will alarm and limit the action, so as to achieve the purpose of safety protection .

In summary, the present invention provides a circuit system and a signal protection method, which can promptly remind the user whether there is water in the line and the size of the water inflow, and can achieve alarm and/or action limitation to prevent accidents. The structure is simple, The performance is reliable, which significantly improves the operation safety and reduces the operation risk.

Those skilled in the art should understand that in actual operation, there are many factors that affect the electrical signals in the circuit system, such as the type of plug, water quality and water intake, etc. The desired preset value range.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A circuit system, comprising a sensor (1), a connector (2) and a controller (3), the sensor (1) is connected to the controller (3) through the connector (2) , characterized in that the circuit system also includes a detection unit (4), The detection unit (4) is used to detect electrical signals at the connector (2) and/or at the controller (3), and send the detected electrical signals to the controller ( 3); The controller (3) is used to determine that the water inflow at the connector (2) exceeds the standard when the value of the electrical signal is within a preset value range, and perform an alarm and/or limit the action; wherein, The controller (3) also determines the priority of the circuit system, and when the priority of the circuit system is the first level and the value of the electrical signal is within a preset value range, the controller ( 3) Carry out alarm and action restriction; When the priority of the circuit system is the second level and the value of the electrical signal is within a preset value range, the controller (3) performs an alarm or action limitation. 2. The circuit system according to claim 1, characterized in that, when the priority of the circuit system is the second level, the controller (3) also determines that the progress at the connector (2) water level, When the value of the electrical signal is within a first preset value range, the controller (3) issues an alarm; When the value of the electric signal is within a second preset value range, the controller (3) performs action limitation. 3. The circuit system according to claim 2, characterized in that the electrical signal is the resistance value of the connector (2). 4. The circuit system according to claim 2, characterized in that, the electrical signal is the voltage value at both ends of the connector (2), the voltage value received by the controller (3), or the The current value of the connector (2) and the controller (3). 5. A construction machine, characterized by comprising the circuit system according to any one of claims 1 to 4. 6. A method for identifying water ingress, comprising the steps of: Step 1, detecting electrical signals at the connector (2) and/or at the controller (3); Step 2, when the value of the electrical signal is within a preset value range, it is determined that the water intake at the connector exceeds the standard, and an alarm and/or action limitation is performed; Wherein, step 2 is specifically: the controller (3) determines the priority of the circuit system, and when the priority of the circuit system is the first level and the value of the electrical signal is within a preset value range, the The controller (3) performs an alarm and action restriction; when the priority of the circuit system is the second level and the value of the electrical signal is within a preset value range, the controller (3) performs an alarm or Movement restrictions. 7. The method for identifying water ingress according to claim 6, characterized in that, when the priority of the circuit system is the second level, the controller (3) also determines that the socket (2) is the degree of water ingress, When the value of the electrical signal is within a first preset value range, the controller (3) issues an alarm; When the value of the electric signal is within a second preset value range, the controller (3) performs action limitation. 8. The method for identifying water ingress according to claim 7, wherein the electrical signal is the resistance value of the connector (2), the voltage value at both ends of the connector (2), the The voltage value received by the controller (3) or the current value passing through the connector (2) and the controller (3).