RU2800974C1 - Door control unit with pneumatic sensitive edge - Google Patents

Abstract

FIELD: control units.

SUBSTANCE: vehicle door control unit with a pneumatic actuator of the door drive mechanism has one door leaf with a seal, the part of which, in contact with the doorway pillar or the second leaf, has a closed cavity and consists of a controller electrically connected to the solenoids of the pneumatic valve that controls the pneumatic actuator; an electronic low pressure sensor having a sensing element electrically connected to the controller; connecting the sensitive element of the electronic low pressure sensor with a closed cavity of the seal; connecting the closed cavity of the seal with the atmosphere, while the electronic low pressure sensor is installed in the control unit; the control unit is located on the body above the doorway; the closed cavity of the door seal is connected by a flexible tube to an electronic low pressure sensor, and the flexible tube is fixed on the door leaf and the moving parts of the door drive mechanism. There is an electrical signal amplifier between the controller and the solenoid.

EFFECT: increased reliability of operation of a vehicle door control unit with a pneumatic sensitive edge.

1 cl, 3 dwg

Description

The control unit is intended for use in transport, namely in the structures of vehicle doors to detect the fact that a passenger or other objects are clamped by a door equipped with a pneumatic rubber profile with a sensitive edge in the form of a tubular element.

Known sensitive edge of the door to protect people or objects from impact (US patent No. 4908483 dated 21.08.1989), containing: an elongated outer shell, compressible when external pressure is applied and made of elastic airtight material for fastening to the edge of the door; an elongated inner tubular element made of a resiliently compressible airtight material, longitudinally located and enclosed in a shell, and the specified inner tubular element has a first end and a hermetically sealed second end, as well as a pressure-sensitive sensor located in a protected part inside the shell so that when By applying external pressure to the sheath at any location, the pressure inside the tubular element is increased and thereby transmitted to the pressure transducer to actuate it.

The disadvantage of this device is the reduced response speed of the sensitive edge of the door to clamping due to its multi-layered and large thickness, as well as the reduced accuracy of measuring pressure changes and the reliability of detecting clamping due to the lack of a microprocessor connected to the sensor.

A control device is known that is sensitive to contact (patent for invention US No. 4773183 dated February 25, 1987) for detecting a foreign object in the gap between the door frame and the movable element for closing the specified gap, containing: a tubular element configured to move on one of the parts frames, and a movable element; means for detecting pressure on the tubular member by a foreign object and outputting a detection signal to a device indicating that pressure has been applied; control means for stopping movement of the movable element in response to the pressure detection signal.

The disadvantage of this device is the increased power consumption due to the need to pump air into the cavity of the elastic sensitive edge.

Programmable controllers Camozzi KD-3.1-V10 and KD-3.1-V10-1 are known, used to control the doors of PAZ-3204 buses (https://ektnn.ru/product/kontroller-blok-protivozazimnyj-paz-3204), which implement the functions blocking the opening of the door while the vehicle is moving, controlling the additional mechanization of the doorway of the vehicle.

A sliding door device for a vehicle is known (US patent No. 8898956 dated May 24, 2013, prototype), containing: a sliding door configured to slide; a door seal attached to the sliding door; a pressure sensor designed to measure the internal pressure in the door seal; a pneumatic line connecting the door seal with a sensor and a relay located on the end surface of the door; an electronic control unit configured to receive a switch signal from the pressure switch to control the opening and closing of the sliding door; an opening and closing valve that allows the pneumatic line to be exposed to the atmosphere or the pneumatic line to be blocked from the atmosphere.

The disadvantage of this device is the lack of reliability due to the presence of pressure in the cavities subject to high wear in contact with the elements of the door opening.

The technical problem solved by the invention is to increase the reliability of the door control unit with a pneumatic sensitive edge.

The technical problem is solved in a door control unit with a sensitive edge and with a pneumatic drive of the mechanism for opening and closing the door, with at least one door leaf with a seal, the part of which, in contact with the doorway pillar or door leaf, has a closed cavity containing a pressure sensor; a microcontroller connected to the closed cavity of the seal, electrically connected to the solenoids of the pneumatic valve that controls the pneumatic drive, while the pressure sensor is an electronic low pressure sensor, pneumatically connected by a flexible tube to the closed cavity of the seal and installed in the control unit located above the doorway on the body, having an electrical connection with the microcontroller of the control unit.

To improve the accuracy of pressure measurement, there is an electrical signal amplifier in the electrical connection of the electronic low pressure sensor with the microcontroller.

To reduce the error in measuring pressure by an electronic sensor during operation, a flexible tube connecting an electronic low-pressure sensor with a seal is made of a polymer material and has an inner diameter selected from the range of 2…5 mm.

The solution of the technical problem, - increasing the reliability of the operation of the door control unit with a pneumatic sensitive edge, is provided by the following set of distinguishing features: the pressure sensor is an electronic low pressure sensor, pneumatically connected by a flexible tube to the closed cavity of the seal, installed in the control unit located above the doorway on body having an electrical connection with the microcontroller of the control unit.

This set of distinguishing features was not found in the course of the patent information search, therefore, the invention meets the criterion of "novelty". It also does not follow explicitly from the prior art, therefore, satisfies the criterion of "inventive step".

In FIG. 1 shows a diagram of a pneumatic drive of a vehicle door with a diagram of a control unit.

In FIG. 2 shows the design of the door leading edge seal with the control unit attached.

In FIG. 3 shows the structure of a doorway control system.

Control unit 1 (Fig. 1-3) door 2 with a sensitive edge 3 and with a pneumatic drive 4 with a pneumatic cylinder 4a and a mechanism 5 for opening and closing the door 2 with door leafs 6a and 6b with a seal 7, part 8 of which is in contact with the second leaf 6b doorway 9, has a closed cavity 10 connected to a low pressure sensor 11 (for example, with a DMP 343 low pressure sensor from BD \ SENSORS RUS) with a pressure sensing element 11a (made, for example, in the form of a silicon strain gauge transducer), connected to the microcontroller 12, which is electrically connected to the solenoids 13a and 13b of the pneumatic valve 14 that controls the pneumatic drive 4, while the sensor 11 is installed in the control unit 1 located above the doorway 9 on the body 16, and is pneumatically connected to the closed cavity 10 of the flexible seal 7 tube 15, and the control unit 1 is connected to the control unit 17 of the solenoids through the interface 18 (for example, RS485, CAN, LIN, etc.).

The control unit 1 has sensors 19 (Fig. 1) of the position of the pistons of pneumatic cylinders and sensors 20 (Fig. 3) of air pressure in the pneumatic system, which can be either analog (20a) or digital (20b).

In the electrical connection of the electronic low pressure sensor 11 with the microcontroller 12, there is an ADC 21 and an amplifier 22 of electrical signals.

The flexible tube 15 connecting the low pressure electronic sensor 11 with the seal 7 is made of a polymeric material and has an inner diameter selected from the range of 2…5 mm.

The door 2 is controlled by the control unit 1. Processor 1a BU 1 processes data coming from analog sensors 20a and digital sensors 20b BU 1, operator panel (not shown), control unit 17 for solenoids 13a and 13b of pneumatic valve 14, which controls pneumatic cylinder 4a PP 4, electronic low pressure sensor 11, transmits to the storage device 1b and through the bus 18a - to the operator panel (not shown), from which the operation thresholds are adjusted programmatically.

Based on the data received, the processor 1a BU 1 decides on the possibility of carrying out the operation (opening or closing the door 2) and gives a signal for its permission to the control unit 17 of the solenoids 13a and 13b of the pneumatic valve 14 PP 4.

The microcontroller 12 of the electronic low pressure sensor 11 polls through the amplifier 22 of electrical signals connected to the ADC 21, which responds to a change in pressure in the closed cavity 10 of the seal 7. In the event of a change in pressure, the microcontroller 12 of the electronic low pressure sensor 11 generates a signal to the control unit 1, indicating about the fact that the compactor encounters an obstacle.

The control unit 17 of the solenoids 13a and 13b of the pneumatic valve 14 PP 4 determines the pressure in the PP 4 system using analog sensors 20a, on the basis of which it generates a signal to the control unit 1, indicating the status 1111 4 (serviceable or faulty), final and initial position pneumatic valve 14 that controls the pneumatic cylinder 4a PP 4 using digital sensors 20b, upon reaching which the fact of the complete opening or closing of the door 2 is indicated, the achievement of which is signaled to the control unit 1.

The processor 1a of the control unit 1 interrogates the analog sensors 20a and digital sensors 20b, the control unit 17 of the solenoids 13a and 13b of the pneumatic valve 14 PP 4, the low pressure electronic sensor 11 before and during the operation, making it possible to determine the state of the door 2 at each discrete moment of time , preventing door 2 obstruction from being pinched.

The introduction of the control unit 17 of the solenoids 13a and 13b of the pneumatic valve 14 PP 4, the electronic low pressure sensor 11 allows you to unload the processor 1a of the control unit 1, removing the need to work with a variety of sensors, leaving only the function of making decisions about the operation required at a given time.

The control unit 1 has a main power supply unit 23 .

The low pressure electronic sensor 11 has a power supply unit 24 .

Claims (1)

A door control unit with a sensitive edge and with a pneumatic drive of the mechanism for opening and closing the door, with at least one door leaf with a seal, the part of which, in contact with the pillar of the doorway or the second door, has a closed cavity containing a pressure sensor connected to the closed cavity compactor is a microcontroller electrically connected to the solenoids of the pneumatic valve that controls the pneumatic actuator, characterized in that the pressure sensor is an electronic low pressure sensor containing a low pressure sensor microcontroller, pneumatically connected by a flexible tube to the closed cavity of the seal, installed in the control unit located above the doorway on body, having an electrical connection with the microcontroller of the control unit, at the same time, a control unit for the solenoids of the pneumatic valve is additionally introduced, which determines the pressure in the system using analog sensors, according to which it generates a signal to the control unit indicating the correct or faulty state of the final and initial position of the pneumatic valve that controls the pneumatic cylinder and indicates the fact of full opening or closing of the door, the achievement of which sends a corresponding signal to the control unit, and in the electrical connection of the electronic low pressure sensor with the microcontroller of the low pressure sensor there is an amplifier of electrical signals, while a flexible tube connecting the electronic sensor low pressure with a seal, made of polymeric material and has an inner diameter selected from the range of 2…5 mm.

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