DE102011107091A1 - Remote control with all-round operator protection - Google Patents

Abstract

A remote control (1) for a self-propelled implement (3), for example for a rammer, a vibrating plate or a roller for soil compaction, has a first transmitting device (4) for transmitting an electromagnetic control signal in a direction of action (WR). Furthermore, a second transmitting device (4, 6) for transmitting an electromagnetic security signal in a security area (S1, S2) is provided.
An operating state of the working device (3) can be predetermined as a function of the safety signal. For example, operating activities of the working device (3) can be prevented if the security signal can be received.
The safety area (S1, S2) comprises a rear area (S2) opposite the direction of action (WR). In this way, protection of an operator (2) of the remote control (1) can be achieved in the rear area (S2) located, for example, behind the operator (2).

Description

The invention relates to a remote control for a self-propelled implement according to the preamble of claim 1. The invention can be used for example for implements for soil compaction such as rammers, vibratory plates or rollers.

Self-propelled soil compaction machines typically have a high mass that is set in motion by driving and / or working movements during operation of the machine. Such soil compaction machines can therefore pose a danger to an operator.

For the operation of such machines safety requirements exist, for example, in the EN 500-4 normalized. According to these safety specifications, ground compaction machines are to be controlled remotely, for example by means of infrared radiation from a safe distance. Furthermore, a shutdown of all operating conditions should be provided if they represent a danger to the operator located in the vicinity of the implement.

By controlling the implement by means of infrared signals it is ensured that there is always a line of sight between the implement and the operator during operation of the implement. Is the line of sight disturbed? the infrared signals are not receivable by the implement so that the implement is not controllable by the remote control. In this case, all operating activities which may pose a danger to the environment of the implement may be suspended and / or terminated. Only when the infrared connection is restored can the operation of the implement continue.

Because of the high transmission power of such infrared remote controls, it is for example from the EP 1 374 199 B1 known to feed these by means of a cable from an external power source.

Furthermore, it is from the EP 1 025 556 B1 It is also known to communicate with the infrared signal of the remote control information about a distance between the operator and the implement. If the distance between the operator and the implement is less than a predetermined value, any operation that may endanger the operator is prohibited until the proper safety distance is restored.

It is still out of the EP 0 577 095 B1 known to emit a near field signal from the remote control, which can be sent for example by means of a weak infrared radiation, which is receivable only in an immediate, close environment of the operator. Upon receipt of the near field signal, all operating activities of the implement which might endanger the operator are also interrupted or discontinued.

Dangers to the operator, such as driving over, pinching or crushing, should be reliably prevented by these measures.

In the known embodiments of the remote control, however, it is possible that the control signal of the remote control on the implement is receivable, although there is no visual contact with the implement. For example, the control signal can be directed to the implement by reflection at an adjacent reflection surface while the operator turns away from the implement. In such a case, it is possible with the known remote controls to control the implement, although there is no visual contact with the implement.

Furthermore, it is possible in the example mentioned that the near field signal is not receivable on the work tool, although the operator is in the immediate vicinity of the implement. For example, the near field signal may be shadowed by the remote from the implement operator or by a housing of the remote control so that it is not receivable on the implement. In this case, an existing work operation of the implement is not interrupted and the machine can continue to be controlled, although the implement and operator are in close proximity to each other and there may be a concrete threat to the operator by the implement.

The invention has for its object to provide a remote control for a self-propelled implement, which guarantees increased safety of the operator during operation of the implement.

This object is achieved by a remote control for a self-propelled implement according to claim 1 and by a method for remotely controlling a self-propelled implement according to claim 12, further developments can be found in the dependent claims.

A remote control for a self-propelled implement, in particular for a soil compaction device such as a rammer, a vibrating plate or a roller, has a first transmitting device for transmitting an electromagnetic control signal in a direction of action.

The control signal may transmit control commands for operation of the implement, such as For example, commands for starting or stopping an engine and / or for starting, accelerating, braking or stopping the implement, as well as commands relating to the working movements, such as instructions for pounding, vibration (driving a vibrator) or rolling. Furthermore, the control signal additional information can be removed, such as removal of the remote control from the implement. A transmission of release or life signals of the operator, for example in the sense of a "dead man's function", by means of the control signal is possible.

The control signal can be transmitted, for example, by infrared radiation. This ensures that there is a visual contact during transmission of control signals between the first transmitting device of the remote control and a receiving device of the working device.

The effective direction of the control signal can be determined by an effective range of the first transmitting device and, for example, correspond to a direction in which the control signal can be transmitted and from which it can be received. It may be determined by an arrangement of the first transmitting device on the remote control. For example, the effective direction can be determined by an optical center of the first transmitting device. In the case of transmission of the control signal by means of infrared radiation, the effective range may comprise an angular range of, for example, ± 30 ° about the optical center.

Furthermore, the remote control has a second transmitting device for transmitting an electromagnetic security signal in a security area. Also, the security signal can be transmitted for example by infrared radiation. It can be sendable in such a way that it can only be received in the security area, or in such a way that a spatial position of the security area can be determined from the reception of the security signal. Furthermore, by the safety signal to a safety area, for example, complementary work area be characterized in the driving and working activities without danger to the operator are executable.

For example, from a reception intensity of the security signal and / or from further parameters when receiving the security signal at the receiving device of the implement a distance to the second transmitting device of the remote control can be determined. Thus, a short range surrounding the remote control or the second transmitting device can be marked with a predetermined spatial maximum distance to the remote control.

The security signal can also be sendable in such a way that predetermined angular ranges around the remote control are identified by the security signal as a security area.

An operating state of the working device can be predetermined as a function of the safety signal, that is to say can be defined or defined. For example, the operating state depending on the reception of the security signal and / or depending on a relative spatial position of the implement to the security area can be specified. The operating state can thus be dependent on whether the implement is in the security area, in the work area and / or in the vicinity.

To specify the operating state, it is possible to release commands transmitted by means of the control signal as a function of the safety signal for the working device, that is to execute on the working device, or to suppress the same, that is to prevent execution by the working device. In this way, for example, a control of the implement by the remote control in response to the security signal can be prevented.

For example, commands to a drive or a steering of the implement can only be executed if it can be concluded from the safety signal and / or its receivability at a safe distance of the implement to the second transmitter unit of the remote control and thus to the operator, or if from the safety signal to conclude that the implement is in the workspace.

In addition, it is possible to actively influence the operating state of the working device by executing predetermined safety commands. For example, depending on the security signal, z. Example, upon detection of entry into the security area, predetermined safety commands, such as for stopping the engine or for braking a propulsion, are performed, thereby to transfer the implement to a safe operating condition.

The operating state of the implement can be specified on the basis of the reception of the safety signal on the implement. For example, the operation of the implement may be interruptible when the safety signal is receivable on the implement. Alternatively, the operation of the implement may be interruptible if the safety signal on the implement is not receivable.

In the case of the remote control according to the invention, the safety area in which the safety signal can be transmitted comprises a reverse area opposite the effective direction of the control signal.

In an exemplary arrangement, the first transmitting device may for example be arranged frontally on a front side of the remote control, which faces away from the operator during a regular operating action. In this exemplary arrangement, the security area in which the security signal is emitted comprises an area located behind the transmitter, which corresponds to the rear area. In the exemplary arrangement, the rear area may also include an area located behind the operator located in the regular operating position.

In one embodiment, the security area also includes a side area laterally located with respect to an orientation of the remote control when used as intended in the effective direction. By emitting the security signal in this area, the space can be marked laterally by the operator, so that the operator can be protected, for example, from lateral contact with the implement. Alternatively or additionally, it is possible to mark a sub-area located above and / or below with respect to an orientation of the remote control when used as intended in the effective direction by the safety signal. In this way it can be ensured that the operator is also protected during body movements during operation of the working device from damaging contact with the implement. This allows improved protection, for example, when bending, but also after a fall of the operator.

In one embodiment, the security signal has a shorter range than the control signal. In this embodiment, the security area corresponds to the proximity area and can be detected on the implement, for example by evaluating the reception and / or the reception intensity of the security signal at the receiving device.

In one embodiment, the second transmitting device has a first and a second transmitting unit for emitting the security signal. By way of example, the first and the second transmitting unit can have devices for emitting the security signal, such as, for example, light-emitting diodes, infrared diodes or antennas.

In this embodiment, the second transmitting unit can be arranged in an area in which a radiation of the first transmitting unit is shadowed, for example, by a housing of the remote control or by the operator who is in a regular operating position. In other words, the second transmitting unit can be arranged in the region of a shadow cast of the first transmitting unit, which can result from the fact that the safety signal emitted by the first transmitting unit is stopped by physical objects, for example the housing of the remote control or the body of the operator. By arranging the second transmitting unit in the area of the shadow, the area irradiated with the security signal by the second transmitting unit can be additionally secured; a "blind spot" in which the security signal is not receivable is avoided. As a result, an increased security of the operator can be ensured by, for example, a behind the operator lying close range is hedged.

Furthermore, by arranging further transmission units in the area of the shadow cast of the first and second transmission unit, an additional increase in security can be achieved. This enables effective all-round operator protection since the security signal can be transmitted in an entire environment surrounding the operator with an ambient angle of 360 °.

In one embodiment, at least one transmitting unit of the second transmitting device may be disposed on a carrying device for carrying the remote control by the operator. The carrying device can facilitate the carrying of the remote control by the operator in the current working operation and at the same time ensure the safety of the operator by emitting the safety signal.

For example, the carrying device may have a neck strap, a lap belt and / or a shoulder strap, on which the transmitting unit is arranged. The transmitting unit can be arranged in a neck pad, pelvic pad and / or shoulder pad. An arrangement on a fixed support frame is possible.

In a variant, the carrying device can be mechanically and / or electrically coupled to the remote control by a coupling device. In addition, a signal line can be provided, with which a transmission request of the remote control can be transmitted to the second transmitting device, which can also be connected to the remote control during coupling. The coupling device may be designed, for example, as a plug or clamp connection, in order to enable simple mechanical and electrical coupling.

If such a coupling device is provided, the transmission of the control signal by the first transmitting device can be inhibited if the coupling device is not or is incorrectly connected to the remote control. In this case, an operation of the remote control and the Working device without the security of the operator ensuring second transmitting device not possible.

In a further variant, at least one of the transmission units of the second transmission device can be arranged on a head protection for the operator. For example, an arrangement on a helmet, ear protection or eye protection is possible. By arranging the first and second and optionally further transmission units along a horizontal circumference of the helmet, for example, the all-round operator protection can be achieved without shadowed areas and without "blind spots". The arrangement of transmitting units, for example, on an ear holder of the ear or eye protection allows lateral protection of the operator.

In a further embodiment, a further security signal from the second transmitting device can be send, which has a greater or alternatively a smaller range than the security signal. In this embodiment, the operating state of the working device may additionally be predeterminable as a function of the further safety signal. This makes it possible to identify a further safety area or the working area in addition to the safety area. The further safety area or the working area can be determined by a predetermined ambient angle around the remote control, for example, starting from the effective direction.

In a variant of the embodiment, the further safety signal has a greater range than the safety signal and identifies the working area. In this embodiment, commands received via the control signal from the receiving device of the implement can be enabled by the further security signal. The commands are only implemented if the further security signal can be received. The security signal can secure the - also backward - near range in this embodiment.

In a further variant of this embodiment, the further safety signal has a shorter range than the safety signal and identifies the further safety range in which, for example, the proximity range and effective range can overlap. The security signal can be pronounced in this variant as an interference signal, which interferes with the reception of a reflected control signal and thereby also secures the back area.

In a further embodiment, the control signal can be transmitted as an infrared signal or radio signal, while the security signal and / or the further security signal are transmitted as infrared signals or as ultrasonic signals.

A transmission of the control signal as an infrared signal ensures that the control commands sent by the remote control to the implement are only receivable on the implement when there is visual contact between the remote control and the implement. By contrast, transmitting the control signal as a radio signal enables fast and efficient transmission of the control signals with good reception, low susceptibility to interference and high data volume.

Since the radio signal can also be transmitted without visual contact, in this embodiment the visual contact can be checked by checking the reception of the further safety signal, which can be transmitted, for example, as an infrared signal. In this embodiment, the further safety signal can characterize the working and / or effective range, while the safety signal secures the near range encompassing the rear region.

The radio signal can be transmitted, for example, with a channel identifier to avoid disturbances of the working operation, for example, by further, used in the receiving area of the implement remote controls. By using a predetermined for example on the remote control and the implement or selectable by the operator channel identifier signals from other remotes can be detected as spurious signals and ignored, for example.

Accordingly, the security signal and / or the further security signal can also be provided or transmitted with a predetermined or selectable channel identifier. This makes it possible to differentiate the security range of the own remote control from that of other remote controls used in the environment. Concerning the control of several work tools with several remote controls in a small space, it is necessary to check whether it is necessary to differentiate the safety areas of the several remote controls or to interrupt the operation of each work equipment in each safety area for safety reasons.

The safety signal and / or the further safety signal can also be ultrasound signals. Since ultrasound is transmitted via vibrations of the air particles, a shadowing of the safety signal by the operator or other objects located in the vicinity of the operator is mitigated, which can improve a reception of the safety signal in the environment of the operator.

In a further embodiment, the security signal or the further security signal may be an interference signal for disturbing the reception of the control signal in the security area. For example, by transmitting the interference signal in the rear region, the reception of a reflected control signal by the working device can be prevented. As a result, an operation of the working device can be prevented, for example, when the operator turns away from the implement with the remote control, but the control signal can be received by reflection on a reflection surface opposite the operator on the implement. The interference signal can be designed such that the control signal is not or only incorrectly receivable.

A method of remotely controlling a self-propelled implement includes transmitting the electromagnetic control signal in the direction of action by the first transmitting device. Furthermore, the method comprises transmitting the electromagnetic security signal in the security area by the second transmitting device, wherein the security area comprises the rear area opposite the effective direction. Depending on the safety signal, the operating state of the implement is specified or specified.

These and further features of the invention are explained in more detail below by means of examples with the aid of the accompanying figures. Show it:

1 schematically a remote control for a self-propelled implement with radiation of a security signal in a security area, which comprises a reverse direction of action of the remote control reverse area, in a plan view;

2 schematically an embodiment in which the security area comprises a top, a sub-area and a side area of the remote control, in a front view;

3 schematically an embodiment with transmitting units for transmitting the security signal in the side area in a plan view;

4 schematically an embodiment with a arranged on a hard hat of the operator transmitting device in a plan view;

5 schematically an embodiment with a arranged on a neck strap of the operator transmitting unit in a rear view;

6 schematically an embodiment with a arranged on a lap belt of the operator transmitting unit in a rear view;

7 schematically an embodiment with two arranged on a shoulder strap of the operator transmission units in a plan view;

8th schematically the embodiment of 7 in a rear view;

9 schematically an embodiment with arranged on the hard hat and a hearing protection transmitting units in a front view;

10 schematically the embodiment of 1 wherein a control signal is a radio signal; and

11 schematically the embodiment of 1 in which an infrared control signal is reflected by a reflection surface and thus can be received by an implement located behind the operator.

1 shows in a supervision a remote control 1 with which an operator 2 an in front of him, self-propelled implement 3 can control. The remote control 1 has a forward transmitting unit 4 on, in a direction of action WR a control signal to a receiving unit 5 of the implement 3 can be sent. In the example, the control signal is an infrared signal which is in an around an optical center or about an optical axis of the transmitting unit 4 located effective range WB by the receiving unit 5 of the implement 3 is receivable.

With the help of the control signal, control commands can be sent to the implement 3 be transferred, which can cause driving and steering movements, working movements and other operations of the implement, such as a start or stop a drive. Furthermore, other information, such as releases already sent operating commands, information regarding a position of the remote control relative to the implement or information on a state of the operator ("deadman button") can be transferred.

In addition, the forwarding unit is forward-looking 4 in a first security area S1, a first security signal is sent. In the example, the short range of the first security area is based on the forward transmission unit 4 clearly that the first safety signal is designed as a signal with a short range. It may, for example, be a weak infrared signal that can only be received in the first security area S1.

At the working device 3 An evaluation logic can be provided which, upon receipt of the first Safety signal through the receiving unit 5 any operations that could pose a hazard to the operator. For example, driving movements, steering movements or working movements of the working device 3 be prevented, or it can be stopped a drive and / or a warning signal to be sent out. So the operator 2 be protected from hazards arising from the implement 3 can go out if this is in the first security area.

Furthermore, a backward transmitting unit 6 provided with a second security signal in a second security area S2 can be sent. The second security area S2 comprises a rear area of the remote control 1 and the operator 2 , which is located in a direction of action WR opposite reverse RR. In the example shown, the second security area S2 corresponds to the rear area.

In the example, the second safety signal is also assumed to be a weak infrared signal which, according to the above-described mode of action, secures the rear area located behind the remote control and the operator in such a way that the operator is protected 2 before operating activities of the implement 3 is ensured in the second security area S2.

2 shows the remote control 1 and the operator 2 in a frontal view. On the remote 1 are next to the forward sending unit 4 a first sideways transmitting unit 7 , a second sideways transmitting unit 8th , an upward sending unit 9 and a downlink sending unit 10 provided, from which a weak infrared security signal can be sent out with a short range.

With the help of the transmitting units 7 . 8th . 9 and 10 can be a regarding the orientation of the remote control 1 when used as intended in the direction of action of laterally located side region S3, S4, upper region S5 located in the direction of action and subregion S6 located below in the direction of action such that the operator is protected against physical damage by the working device located or entering one of the regions S3 to S6 3 is safely protected.

For example, protection of the operator by the security signal transmitted by the first and second lateral transmitting units is necessary when the operator turns sideways during operation of the machine. A protection of the operator 2 through the up and down sending units 9 and 10 is necessary, for example, when the operator is leaning forward or falling during operation of the implement.

3 shows an arrangement of a left side protruding transmitting unit 11 and a right side outstanding transmitting unit 12 at the remote control 1 , As a result of the arrangement shown, the security signal can be transmitted in a surrounding security area S encompassing the rear area.

Due to the exposed spatial position of the left and right side outstanding transmitter units 11 and 12 is also a radiation of the security signal in the in 2 shown side areas S3, S4 favors. Furthermore, in a surrounding area of the operator 2 , in that of one of the laterally outstanding transmitting units 11 . 12 transmitted security signal, for example by the operator 2 or a housing of the remote control 1 is shadowed, that of the other side protruding transmitting unit 12 . 11 transmitted security signal be receivable. Thus, an all-round security of the operator 2 be ensured in the surrounding security area S.

4 shows an alternative or additional arrangement of a helmet sending unit 13 on a construction helmet 14 of the operator 2 the remote control 1 , Through the exposed fee of the helm unit 13 a shadow of the operator is largely avoided, and the operator 2 surrounding security area S can be effectively secured by the security signal.

5 shows the operator 2 the remote control 1 in a rear view. In the example, the backward sending unit 6 on a neck strap 15 or an associated neck pad arranged. The neck strap 15 is part of a carrying device of the remote control 1 , and finds as support of the operator 2 great acceptance. Due to the rearward arrangement of the rear-facing transmission unit 6 in the neck area is an illumination or a transmission of the security signal in the rear area and thus a backup of in 1 shown second security area S2 possible.

6 shows a further possibility for the arrangement of the rear-facing transmitting unit 6 on a lap belt 16 of the operator 2 the remote control 1 , Also the lap belt 16 may be part of the carrying device and the operator while holding the remote control 1 support. The rearward alignment makes it possible to transmit the security signal in the second security area S2 comprising the rear area.

7 shows in a plan view of an arrangement of two rear-facing transmission units 6a . 6b on a shoulder carrier 17 of the operator 2 the remote control 1 , By virtue of the arrangement, the second security area S2 encompassing the rear area can be effectively secured by the security signal, since a shadow of the emission of one of the two rear-facing transmission units 6a . 6b by the radiation of the other transmitting unit 6b . 6a can be illuminated. In addition, by wearing the shoulder straps 17 on both shoulders of the operator 2 Ensures that a lateral slipping or twisting of the shoulder strap 17 and thus the first and second reverse transmission units 6a and 6b is largely avoided.

Furthermore, the embodiment has two coupling devices 18a and 18b on, with which the remote control 1 mechanically and electrically with the shoulder strap 17 can be coupled. The coupling devices 18a and 18b For example, they can be designed as a plug-in connection or as a hook-in connection with a separate electrical terminal. Through the electrical connection, the backward transmitting units 6a and 6b through the remote control 1 be powered with electricity. Furthermore, additional information regarding the transmitted safety signal can be transmitted.

The through the coupling devices 18a . 18b achieved coupling can be done with a evaluation logic of the remote control 1 be connected by the failure of one or both of the coupled rear-facing transmission units 6a . 6b the operation of the implement 3 is interrupted and / or a warning is issued to the operator.

8th shows the embodiment 7 in a rear view.

9 shows a further embodiment in which further transmitting units 19 . 20 . 21 . 22 on the side of the construction helmet 14 of the operator 2 or hearing protection 18 are arranged. Alternatively, the other transmission units 19 . 20 . 21 . 22 also on ironing an eye protection 23 be provided. Due to the lateral or rearward orientation of the other transmission units 19 . 20 . 21 . 22 will be an effective illumination of the in 1 shown, the rear area comprehensive second security area S2 and the in 2 shown side area S3, S4 possible.

10 shows in a plan another embodiment in which a radio control signal 24 Control commands to the implement 3 transfers. The radio control signal 24 may be, for example, from the forward sending unit 4 or from another transmitting unit (not shown), for example an antenna.

Furthermore, how to 1 already described, the safety signal as an infrared signal from the forward transmitting unit 4 and the backward sending unit 6 in the first and second security area S1, S2 sent.

In addition, the forward sending unit transmits 4 another security signal with a longer range, which can be transmitted for example by infrared radiation. The further safety signal is in the example shown in the effective range WB of the receiving unit 5 of the implement 3 receivable. By the further safety signal, for example, a release of the over the radio control signal 24 transmitted radio signals or commands are transmitted.

The transmission of the additional safety signal via infrared ensures that the release of the control commands only on the implement 3 can be received when a visual contact between the forward transmitting unit 4 the remote control 1 and the receiving unit 5 of the implement 3 consists.

The exemplary embodiment combines the effective and less interference-prone data transmission of control commands by the radio control signal 24 with a protection of the first and second security area S1, S2 and the visual contact in the effective range WB in each case by infrared signals.

In 11 is shown an operating situation in which the operator 2 himself with the remote control 1 from the implement 3 turned away. The first and second security areas S1 and S2 are transmitted by transmitting the security signal by the remote control 1 as in 1 described relative to the orientation of the remote control 1 educated. Furthermore, by the forward transmitting unit 4 an infrared control signal sent in the effective range, which by a reflection surface 25 , which may for example be formed by a glass pane, is reflected such that it is at the receiving unit 5 of the implement behind the operator 3 is receivable. Due to the reflection of the control signal, the working device 3 in the case shown receive the control commands of the remote control and thus perform normal operating activities. Through the illustrated entry of the implement 3 in the behind the operator 2 located second security area S2 will be operating activities, which pose a threat to the operator 2 could go out, but certainly prevented. As a result, an all-round security of the operator can be ensured even in the illustrated operating situation.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1374199 B1 [0005]
• EP 1025556 B1 [0006]
• EP 0577095 B1 [0007]

Cited non-patent literature

• EN 500-4 [0003]

Claims (13)

Remote control ( 1 ) for a self-propelled implement ( 3 ), with a first transmitting device ( 4 ) for transmitting an electromagnetic control signal in an effective direction (WR), and a second transmitting device ( 4 . 6 ) for transmitting an electromagnetic security signal in a security area (S1, S2); wherein an operating state of the working device ( 3 ) can be predetermined as a function of the safety signal, and wherein the safety area (S1, S2) comprises a rear area opposite the direction of action (WR). Remote control according to one of the preceding claims, wherein the safety signal has a shorter range than the control signal. Remote control according to one of the preceding claims, wherein the security area (S1, S2) has a side area (S3, S4) located laterally with respect to an orientation of the remote control when used as intended, (S3, S4) located above the upper area (S5) and / or below ( S6). Remote control according to one of the preceding claims, wherein the second transmitting device ( 4 . 6 ) a first and a second transmitting unit ( 11 . 12 ) for emitting the security signal, and wherein the second transmitting unit ( 12 ) in a region of a through a housing of the remote control ( 1 ) or by an operator in a regular operating position ( 2 ) can be generated shadowing. Remote control according to one of the preceding claims, wherein at least one transmitting unit ( 6 ) of the second transmitting device on a carrying device ( 15 . 16 . 17 ) is arranged for carrying the remote control by the operator. Remote control according to claim 5, wherein the carrying device ( 17 ) a coupling device ( 18a . 18b ) for coupling with the remote control ( 1 ), and wherein the transmitting unit ( 6a . 6b ) of the second transmitting device through the coupling device ( 18a . 18b ) electrically with the remote control ( 1 ) can be coupled. Remote control according to claim 5 or 6, wherein the carrying device ( 15 . 16 . 17 ) a neck strap ( 15 ), a lap belt ( 16 ) and / or a shoulder wear ( 17 ), on which the transmitting unit ( 6a . 6b ) is arranged. Remote control according to one of the preceding claims, wherein at least one transmitting unit ( 19 . 20 . 21 . 22 ) of the second transmitting device on a head protection ( 14 . 18 . 23 ) can be arranged for the operator. Remote control according to one of the preceding claims, wherein a further safety signal from the second transmitting device ( 4 . 6 ), and wherein the further security signal has a greater or lesser range than the security signal. Remote control according to one of the preceding claims, wherein the control signal is an infrared signal or a radio signal ( 24 ), and wherein the security signal and / or the further security signal is an infrared signal or an ultrasonic signal. Remote control according to one of the preceding claims, wherein the safety signal or the further safety signal is an interference signal for disturbing the reception of the control signal in a predetermined spatial area (S2). A remote control according to any one of the preceding claims, wherein presetting the operating state means interrupting operation of the working device ( 3 ) and / or a drive of the implement ( 3 ). Method for remote control of a self-propelled implement ( 3 ), comprising: transmitting an electromagnetic control signal in a direction of action (WR) by means of a remote control ( 1 ) arranged first transmitting device ( 4 ), Transmitting an electromagnetic security signal in a security area (S1, S2) by means of a remote control ( 1 ) arranged second transmitting device ( 4 . 6 ), and predetermining an operating state of the implement ( 3 ) in response to the safety signal; wherein the security area (S1, S2) comprises a rear area (S2) opposite to the effective direction.

Images