DE20300047U1 - Electronic remote level sensor for setting crane bases, washing machines and camper van hearths has light emitting diode and photo sensors to measure bubble position - Google Patents

Abstract

An electronic remote level sensor has a high frequency modulated light emitting diode (LED) on one side of the gas bubble (7) and two photo sensors (S1, S2) on the other which measure the bubble position for radio transmission (12, 13) and display (14). Alternatively a pair of light sources may be used with a single sensor or a ring of lights with a single sensor in the center of an annular level tube.

Description

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Electronic remote spirit level

The invention relates to an electronic remote spirit level according to the preamble of claim 1.

As is well known, spirit levels are used to measure and display the actual position of an object that is to be aligned in a defined target position and, after determining the deviation between the actual position and the target position, to make a corresponding readjustment of the object until the actual position matches the desired target position.

It often happens that the measuring location and the setting location from which an adjustment is to be made using adjustment devices (e.g. adjustment threads, servomotors) are spatially separated from one another and/or that the measuring location cannot be seen from the setting location or can only be seen with difficulty by intervening with additional measures, in particular with the help of assistants. This problem arises in particular when, for example, the horizontal positioning of the top of a washing machine, the machine bed of a machine tool, the stove top inside a camper van or a construction beam hanging freely from the boom of a construction crane is to be achieved, but the corresponding adjustment can only be carried out using spatially distant feet, external adjustment supports on the camper van or by the crane operator, often only by shouting or signaling. In all of these cases, an exact position adjustment cannot be carried out practicably without outside help or can only be carried out inaccurately. In addition, in many cases, particularly when adjusting surfaces horizontally, it is often necessary to operate several mutually influencing adjustment devices one after the other. It is therefore desirable for the adjuster carrying out the adjustment to receive immediate and simultaneous feedback on the effect of his adjustment measures via a device that displays the measurement process directly at the adjustment location.

A remote spirit level, in particular a radio spirit level with horizontal and vertical spirit levels in a conventional orthogonal arrangement, is known from DE-OS 199 46 768, in which the inclination data of a surface to be adjusted determined at the measuring location can be transmitted wirelessly to the receiver part of a display device located at the setting location using a measuring device and transmitter. The position of the gas bubble is measured in the respective spirit level using two infrared light barriers. However, the disadvantage here is that the location of the gas bubble moving to the left or right out of the equilibrium position can only be determined discretely and discontinuously by triggering or not triggering the light barriers according to the "all or nothing principle" and therefore only a digital signal can be generated which qualitatively indicates either that the gas bubble is in the equilibrium position or that it has moved out of the equilibrium position. A quantitative determination of the location of the gas bubble is not possible. This fundamentally reduces the level of accuracy that can be achieved.

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The object of the invention is therefore to provide a remote spirit level in which the location of the gas bubble is determined continuously or at least quasi-continuously and accordingly an analogue signal which exactly corresponds to the location of the gas bubble can be generated simply and inexpensively and transmitted to a display device different from the measuring location.

This object is achieved according to the invention in that the horizontal vial and the vertical vial are conventional barrel vials, that a light-emitting component is arranged on one side next to the barrel vials at the level of the equilibrium position of the gas bubble, and that a first photo sensor and a second photo sensor are arranged on the other side of the barrel vials opposite the light-emitting component and at the level of the two end boundary layers of the gas bubble to the liquid.

It is particularly advantageous and surprising that with the arrangement according to the invention with a light-emitting component, preferably a light-emitting diode, each position of the gas bubble can be assigned a specific light flow that can be recorded by photo sensors and, after optoelectronic conversion, a continuously increasing or decreasing analog signal in the form of an electrical voltage or an electrical current. The deviation of the gas bubble from the equilibrium position determined by the calibrated scale can be both precisely measured and precisely reproduced. The resolution is very high and is in the range of angular minutes for an angle display of the degree of inclination or in the permille range for the gradient display of the degree of inclination. By using suitable display means, e.g. the light strip of LEDs arranged next to one another in a bar graph display, the position of the gas bubble can be seen running on a display unit.

In an advantageous embodiment, a first light-emitting component and a second light-emitting component are arranged on one side next to the barrel vials at the level of the two end boundary layers between the gas bubble and the liquid, which emit light alternately at a high frequency, and a photo sensor is arranged on the other side of the barrel vials opposite the light-emitting components and approximately at the level of the equilibrium position of the gas bubble. The position of the gas bubble is calculated using evaluation electronics from the respective voltage level.

These designs work both when the spirit levels are illuminated from the side and when the light falls vertically on the gas bubble, with the sensors then being arranged below the spirit level.

In a particularly advantageous design, both the horizontal and vertical vials are hollow ring vials in the form of a hollow torus, with the photo sensor located centrally in the interior of each and with several light-emitting components arranged rotationally symmetrically around the hollow ring vials in the outer space. This enables quantitatively and qualitatively precise measurement over a full angle range of 360°, whereas when using conventional barrel vials only small deviations from the equilibrium position can be precisely recorded.

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Increasing the number of LEDs surrounding the hollow ring spirit level results in a higher measurement resolution.

It is also advantageous for hollow ring vials to have the light-emitting component centrally located in their interior and for several photo sensors arranged rotationally symmetrically around the hollow ring vials to be located in their exterior. Here too, increasing the number of sensors results in a higher measurement resolution.

In order to avoid scattering losses, it can advantageously be provided that the light-emitting components are located directly on the hollow ring vials.

In a particularly advantageous embodiment, the remote spirit level has a single vial, which is designed as a two-shell hollow hemisphere vial or as a two-shell hollow sphere vial in the manner of a further developed can vial, the equatorial plane of which is aligned parallel to the surface to be measured and in whose interior the light-emitting component is located centrally and in whose exterior several centrally symmetrically arranged photo sensors (S) are arranged. This arrangement allows the position of the gas bubble to be assigned to a defined point in the half-space or in the full space over half or the entire solid angle range.

A microcontroller, a microprocessor or a microcomputer is preferably used as the evaluation electronics. The data representing the surface inclination is transmitted analogue or digitally via cable, but particularly preferably wirelessly via radio connection, whereby in the latter case a first transmitter unit, which is also integrated, is connected downstream of the first evaluation electronics of the inclination measuring unit and a first receiver unit is connected upstream of the second evaluation electronics of the inclination display unit.

In an advantageous embodiment, the data is displayed analogously or after appropriate AD conversion either optically via a bar graph display or via an alphanumeric 7-segment display or via an LCD display or via a graphic display in angle degrees or gradient percent or coded or with graphic support and/or acoustically via signals or text announcements. It has proven particularly advantageous to give the surface of the LEDs a frosted glass effect, which can be achieved in a simple manner, e.g. by grinding or roughening the glass surface of the LEDs. This means that the light cone generated by the LED is very homogeneous and has relatively sharp contrasting light-dark boundaries, in contrast to the non-homogeneous light cone when using smooth surfaces of non-opaque LEDs.

It is particularly advantageous that a tilt adjustment unit is integrated into the tilt display unit for remote adjustment of a tilt adjustment device, wherein the data is transmitted analogue or digitally by cable or wirelessly by radio connection from the tilt adjustment unit to an actuator working as a tilt adjuster, the tilt adjustment device, preferably a stepper motor, wherein in the case of the wireless radio connection the tilt adjustment unit has a second transmitting unit and the tilt adjustment device has a second upstream

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receiver unit. This measure ensures that the tilt adjustment device can also be operated remotely without the need for an assistant.

It is also advantageous to connect a comparator between the inclination display unit and the inclination setting unit, in which a predeterminable surface inclination is stored as a target inclination value and which, after comparison with the actual inclination value present on the inclination display unit, transmits a corresponding difference signal to the inclination setting device, whereby the predefined inclination control variable is automatically regulated. This measure ensures that the comparison between the target value and the actual value, which was previously also carried out by the person doing the adjustment, can also be carried out automatically.

Further advantages and features of the invention will become apparent from the following description of embodiments.

Figure 1 is a block diagram of the remote spirit level according to the invention with a first system component 1.1 and a second system component 1.2,

Figure 2 shows a first embodiment of an inclination measuring unit of the remote spirit level according to the invention with a barrel spirit level illuminated from the side with a light-emitting diode and two sensors,

Figure 3 shows a second embodiment of an inclination measuring unit of the remote spirit level according to the invention with a barrel spirit level illuminated in plan view with a light-emitting diode and two sensors,

Figure 4 shows a third embodiment of an inclination measuring unit of the remote spirit level according to the invention with a barrel spirit level illuminated from the side with two LEDs and a sensor,

Figure 5 shows a fourth embodiment of an inclination measuring unit of the remote spirit level according to the invention with a barrel spirit level illuminated in plan view with two light-emitting diodes and a sensor,

Figure 6 shows a fifth embodiment of the remote spirit level according to the invention with a hollow ring spirit level and a centrally arranged sensor,

Figure 7 shows a sixth embodiment of the remote spirit level according to the invention with a hollow ring spirit level and a centrally arranged light-emitting diode,

Figure 8 The block diagram of an inclination data display via a measuring device,

Figure 9 The block diagram of a tilt data display via a bar graph display,

Figure 10 The block diagram of a tilt data display via a 7-segment display,

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Figure 11 The block diagram of an inclination data display via an LCD display,

Figure 12 The block diagram of a tilt data display via a graphic display,

Figure 13 The block diagram of the remote spirit level according to the invention with a first system component 1.1, a second system component 1.2 and a third system component 1.3 according to a seventh embodiment.

Figure 1 shows a block diagram of the remote spirit level 1 according to the invention with a first system component 1.1 and a second system component 1.2 data-linked via a radio connection.

The first system component 1.1 has a horizontal spirit level 2.1 and a vertical spirit level 2.2 of conventional barrel spirit levels 2 in a conventional orthogonal arrangement, an inclination measuring unit 6, a downstream first evaluation electronics unit 11 and a first transmission unit 12. The second system component 1.2 has a first receiving unit 13, a second evaluation electronics unit 21 and an inclination display unit 14.

Figure 2 shows a first embodiment of the inclination measuring unit 6 of the remote spirit level 1 according to the invention with a barrel spirit level 2 illuminated from the side by a light-emitting diode LED and a first photo sensor S1 and a second photo sensor S2. The light from the emitting light-emitting diode LED flows through a glass wall and a liquid 8 enclosed by it, as well as a gas bubble 7 of the barrel spirit level 2. Depending on the source and sensor used, light in a bandwidth of approx. 200 nm (UV range) to 2,000 nm (IR range) can be effective. Light emitters and photo sensors have the same working range, which can be anywhere in the wavelength range between 200 nm and 2,000 nm.

Instead of the LED, any other type of source in the range of light and heat radiation from ultraviolet to infrared, such as a light bulb or a laser, can be used. Phototransistors, photodiodes or photoresistors can be used as photo sensors S1.S2. The distance between the two photo sensors S1, S2 is smaller than the length of the gas bubble 7. The aim is to achieve a smooth, uniform run of the gas bubble that is well dampened by using highly viscous oil as the liquid. Barrel spirit levels designed in this way have a biconcave barrel wall surface in cross-section rather than a biconvex one in order to reduce the internal friction that generally occurs when the gas bubble runs. This means that the moving gas bubble always finds symmetrical and therefore consistent geometric conditions, which ensures that it runs undisturbed by the spatial conditions and therefore evenly. The equilibrium position of the gas bubble 7, which represents the horizontal alignment of the first system component 1.1 of the remote spirit level 1, is defined by its symmetrical position between two calibration scales. The light is refracted and reflected at the surface of the interfaces gas/as/liquid 8 and liquid 8 / gas bubble 7. A large number of

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Shadows and light beams, which depend on the wall material of the barrel spirit level 2, the nature of the liquid 8 and the shape of the gas bubble 7. In general, there are always differences in brightness on the light exit side, the spatial arrangement of which is directly related to the position of the gas bubble 7. With a favorable arrangement of the light source and the light sensors, a certain light flux and, after photoelectric conversion, a correspondingly defined electrical voltage or electrical current can be assigned to each position of the gas bubble 7. The deviation from the equilibrium position can be precisely measured and reproduced. The resolution is very high and is in the range of angular minutes for the selected angle display or in the per mille range for the desired gradient percentage display. Two photo sensors S1, S2 arranged on the other side of the barrel spirit level 2 at about the height of the calibration scales are connected as a measuring bridge so that the measuring signal between the sensors S1, S2 is zero exactly when the two sensors receive the same amount of light on an integrated basis, i.e. when the gas bubble is in the equilibrium position. Each differential signal picked up thus clearly corresponds to the position of the gas bubble 8 and thus the extent of the deviation from the equilibrium position.

Figure 3 shows a second embodiment of an inclination measuring unit of the remote spirit level according to the invention with a barrel spirit level illuminated from above with a light-emitting diode LED and two sensors S1, S2. This arrangement also does not differ in principle from the first embodiment.

Figure 4 shows a third embodiment of an inclination measuring unit 6 of the remote spirit level according to the invention with a barrel spirit level 2 illuminated from the side, but with two light-emitting diodes LED1.LED2 and a sensor S. The light from two light sources arranged at the level of the calibration scales, namely the light-emitting diodes LED1.LED2, which light up alternately at high frequency via an electronic switch 20, flows alternately through the barrel spirit level 2 and is essentially refracted and reflected on the surface of the gas bubble. The photosensor S arranged at the level of the equilibrium position of the gas bubble 7 on the other side of the barrel spirit level 2 opposite the light-emitting diodes LED1,LED2 converts the light received by one of the two light-emitting diodes LED1,LED2 into a corresponding current or voltage signal. The gas bubble is in equilibrium when the amounts of light received by the photo sensor S from the light-emitting diodes LED1 and LED2, whose distance is smaller than the length of the gas bubble, are equal. The signals that alternately originate from the light of the light-emitting diode LED1 or the light-emitting diode LED2 and are alternately received by the photo sensor are related using suitable evaluation electronics, so that a clear measurement value can be assigned to each location of the gas bubble. The measuring principle described here is essentially a reversal of the measuring principle presented in the description of Figures 2 and 3.

Figure 5 shows a fourth embodiment of an inclination measuring unit of the remote spirit level according to the invention with a barrel spirit level 2 illuminated in plan view with two light-emitting diodes LED1.LED2 and a sensor S. Even with this arrangement, there is no fundamental difference to the third embodiment.

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Figure 6 shows a fifth embodiment of the remote spirit level according to the invention with a hollow ring spirit level 3 and a sensor S arranged centrally in an interior space 9. A gas bubble 7 runs in a liquid 8 of the hollow ring spirit level 3. Depending on the location that the gas bubble 7 takes up when the hollow ring spirit level 3 rotates up to 360° in accordance with the inclination of an object to be measured, a correspondingly modified signal representing the location of the gas bubble is generated in at least one of the light-emitting diodes LEDs peripherally surrounding the hollow ring spirit level 3 in a rotationally symmetrical and tight manner due to the different transparency and different refractive properties of the liquid and gas (air) media. The number of LEDs to be arranged depends on the geometric conditions, such as the diameter of the hollow ring spirit level 3 and the length of the gas bubble 7. It can also be advantageous to provide that each of the peripheral LEDs emits alternately like a running light and thus locates the position of the gas bubble. Increasing the number of LEDs results in a higher measurement resolution.

Figure 7 shows a sixth embodiment of the remote spirit level according to the invention with the hollow ring spirit level 3 and a centrally arranged, continuously emitting/illuminating LED light-emitting diode as well as a large number of photo sensors S peripherally in an external space 10 close to the hollow ring spirit level 3. The number of photo sensors S to be arranged depends on the geometric conditions such as the diameter of the hollow ring spirit level 3 and the length of the gas bubble 7. The sensors are queried individually or in pairs one after the other, with the signals received being evaluated by a controller. The measuring principle described here is essentially a reversal of the measuring principle presented in the description of Figure 6. Increasing the number of photo sensors S results in a higher measurement value resolution.

Figure 8 shows the block diagram of a known inclination data display via a measuring device acting as an inclination display unit 14 in which the data is transmitted from a sensor to the measuring device via a cable.

Figure 9 shows the block diagram of a known inclination data display via a bar graph display acting as an inclination display unit 14, in which the data from sensors A ₁ B ₁ C ₁ D is transmitted via a cable and a controller to two orthogonally bar-shaped light strips made up of individual LEDs, which symbolize the x and y alignment of a surface. The spirit level, in this case a barrel spirit level, can basically be simulated using LEDs. Only when both spirit levels are aligned exactly horizontally do the two innermost LEDs of both light bars light up in a uniform color, e.g. yellow. Otherwise, at least one LED of the light bar representing a spirit level that is not positioned horizontally lights up, e.g. red.

Figure 10 shows the block diagram of an inclination data display via a 7-segment display, where the analog signals arriving via a cable are converted into digital values by a controller and subsequently a code number or a display in degrees of angle or in gradient percent is output.

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Figure 11 shows the block diagram of an inclination data display via an LCD display, where after converting the analog signal at the output of the sensors S1.S2 in the controller into a digital signal and forwarding it via a cable, an LCD display with 2x16 characters and an upstream controller, in which, for example, the processing of trigonometric functions can also be carried out, is created.

Figure 12 shows the block diagram of an inclination data display on a graphic display, on which basically any number of representations are possible, e.g. as in this case a representation in angle degrees, in gradient percentages or the illustration using gradient lines. Of course, other system information, such as temperature or charge level displays of the accumulators required for the electronics in the system components 1.1, 1.2, 1.3 can also be shown in the display unit.

Figure 13 shows the block diagram of the remote spirit level according to the invention with a first system component 1.1, a second system component 1.2 and a third system component 1.3 having a second receiving unit 18 and an inclination adjustment device 16 according to a seventh embodiment.

The first system component 1.1 has a horizontal spirit level 2.1 and a vertical spirit level 2.2 of conventional barrel spirit levels 2 in a conventional orthogonal arrangement, an inclination measuring unit 6, a downstream first evaluation electronics 11 and a first transmission unit 12. The second system component 1.2 has a first receiving part 13, a second evaluation electronics 21 and an inclination display unit 14. In order to also enable remote adjustment of the inclination adjustment device 16 of the 3rd system component 1.3, in this case a servomotor M, which works as an actuator, an inclination adjustment unit 15 is integrated into the inclination display unit 14, wherein the data is transmitted wirelessly in analog or digital form via radio link from the inclination adjustment unit 15 to the inclination adjustment device 16, wherein a second transmitting unit 17 is connected downstream of the inclination adjustment unit 15 and a second receiving unit 18 is connected upstream of the inclination adjustment device 16. This embodiment enables the remote adjustment of a person performing the adjustment from a location that is different from both the measuring location and the adjustment location.

A controller 19 is also connected between the inclination display unit 14 and the inclination setting unit 15, in which a predeterminable surface inclination is stored as a target inclination value and which, after comparison with the actual inclination value present on the inclination display unit 14, automatically transmits a corresponding difference signal to the inclination setting device 16. This results in fully automatic control of the predefined inclination control variable. This measure ensures that the comparison between the target value and the actual value, which was previously also carried out by the person doing the adjustment, can now also be carried out automatically.

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This system allows surfaces to be adjusted at the push of a button after a target value has been set in advance, without any human intervention.

Of course, all of the above-mentioned embodiments can also be transferred to a particularly preferred wireless radio connection between the system components 1.1, 1.2, 1.3 and the individual display types can be substituted for one another as desired.

Reference symbol list

1 remote spirit level

1.1 First system component

1.2 second system component

1.3 Third system component

2 ton dragonflies

2.1 Horizontal spirit level

2.2 Vertical spirit level

3 Hollow Ring Spirit Levels 4

6 Inclination measuring unit

7 Gas bubble

8 Liquid

9 Interior of 3

10 Outdoor space of 3

11 first evaluation electronics

12 first transmitter unit

13 first receiving unit

14 Tilt display unit

15 Tilt adjustment unit

16 Tilt adjustment device

17 second transmitter unit

18 second receiving unit

19 controllers

20 electronic switches

S Photo Sensors

51 first photo sensor

52 second photo sensor LED light-emitting diodes LED1 first light-emitting diode LED2 second light-emitting diode

Claims (15)

1. Electronic remote spirit level with a first system component located at a measuring location for remote measurement and remote reporting of the data representing the inclination of a surface, each with a horizontal spirit level having a scale and filled with a liquid and a vertical spirit level in an orthogonal arrangement, with a gas bubble in the liquid running over the scale depending on the inclination of the surface, each with an inclination measuring unit measuring the position of the gas bubble relative to the scale at the measuring location with a downstream first evaluation electronics, the inclination measuring unit having at least one light-emitting component and at least one light-sensitive optoelectronic photo sensor, and with a second system component located at a setting location for remote display of the data representing the inclination of a surface, with an inclination display unit with an upstream second evaluation electronics, the setting location being spatially remote from the measuring location and the data being spatially transmitted from the inclination measuring unit to the inclination display unit, characterized in that the horizontal spirit level ( 2.1 ) and the Vertical spirit level ( 2.2 ) conventional barrel spirit levels ( 2 ) are that on one side next to the barrel spirit levels ( 2 ) at the level of the equilibrium position of the gas bubble ( 7 ) a light-emitting component (LED) is arranged and that on the other side of the barrel spirit levels ( 2 ) opposite the light-emitting component (LED) and at the level of the two end-side boundary layers of the gas bubble ( 7 ) to the liquid ( 8 ) a first photo sensor (S1) and a second photo sensor (S2) are arranged. 2. Electronic remote spirit level according to the preamble of claim 1, characterized in that the horizontal spirit level ( 2.1 ) and the vertical spirit level ( 2.1 ) are conventional barrel spirit levels ( 2 ), that on one side next to the barrel spirit levels ( 2 ) at the level of the two end boundary layers of the gas bubble ( 7 ) to the liquid ( 8 ) a first light-emitting component (LED1) and a second light-emitting component (LED2) are arranged, which emit light alternately at a high frequency, and that on the other side of the barrel spirit levels ( 2 ) opposite the light-emitting components (LED1, LED2) and at the level of the equilibrium position of the gas bubble ( 7 ), the photo sensor (S) is arranged. 3. Electronic remote spirit level according to the preamble of claim 1, characterized in that the horizontal vial ( 2.1 ) and the vertical vial ( 2.2 ) are hollow ring vials ( 3 ), that the photo sensor (S) is located centrally in their interior ( 9 ) and that in their exterior ( 10 ) several, preferably 2n (n = 4, 5, 6, . . .) light-emitting components (LED) are arranged rotationally symmetrically around the hollow ring vials ( 3 ). 4. Electronic remote spirit level according to the preamble of claim 1, characterized in that the horizontal vial ( 2.1 ) and the vertical vial ( 2.2 ) are hollow ring vials ( 3 ), that the light-emitting component (LED) is located centrally in their interior ( 9 ) and that a plurality of photo sensors ( S ), preferably 2n (n = 4, 5, 6, . . .) arranged rotationally symmetrically around the hollow ring vials ( 3.1 , 3.2 ), are arranged in their outer space (10). 5. Electronic remote spirit level according to claim 1 or 2 or 3, characterized in that the light-emitting components (LED) are located directly on the spirit levels ( 2 , 3 ). 6. Electronic remote spirit level according to claim 1 or 2 or 4, characterized in that the light-sensitive optoelectronic photo sensors (S) are located directly on the spirit levels ( 2 , 3 ). 7. Electronic remote spirit level with a first system component located at a measuring location for remote measurement and remote reporting of the data representing the inclination of a surface, with at least one spirit level having a scale and filled with a liquid, wherein a gas bubble in the liquid runs over the scale depending on the inclination of the surface, with an inclination measuring unit measuring the position of the gas bubble relative to the scale at the measuring location with a downstream first evaluation electronics, wherein the inclination measuring unit has at least one light-emitting component and at least one light-sensitive optoelectronic photo sensor, and with a second system component located at a setting location for remote display of the data representing the inclination of a surface, with an inclination display unit with an upstream second evaluation electronics, wherein the setting location is spatially remote from the measuring location and wherein the data is spatially transmitted from the inclination measuring unit to the inclination display unit, characterized in that the spirit level is a two-shell hollow hemisphere spirit level or a two-shell hollow sphere spirit level whose equatorial plane is aligned parallel to the surface to be measured and in whose interior ( 9 ) the light-emitting component (LED) is located centrally and in whose exterior ( 10 ) several, preferably 2n (n = 4, 5, 6, . . .) point-symmetrically arranged photo sensors (S) are arranged. 8. Electronic remote spirit level according to one of the preceding claims, characterized in that the light-emitting components (LED) are light-emitting diodes emitting in the visible range between 4000 and 8000 Å. 9. Electronic remote spirit level according to one of the preceding claims, characterized in that the light-sensitive optoelectronic photo sensors (S) are photodiodes sensitive in the visible range between 4000 and 8000 Å. 10. Electronic remote spirit level according to one of the preceding claims, characterized in that the evaluation electronics ( 11 , 21 ) are microcontrollers, microprocessors or microcomputers. 11. Electronic remote spirit level according to one of the preceding claims, characterized in that the data are transmitted analogue or digitally by cable or wirelessly by radio connection, wherein in the latter case a likewise integrated first transmitting unit ( 12 ) is connected downstream of the first evaluation electronics ( 11 ) of the inclination measuring unit ( 6 ) and wherein a first receiving unit ( 13 ) is connected upstream of the second evaluation electronics ( 21 ) of the inclination display unit ( 14 ). 12. Electronic remote spirit level according to one of the preceding claims, characterized in that the data is reproduced analogously or after appropriate AD conversion either optically via a bar graph display or via an alphanumeric 7-segment display or via an LCD display or via a graphic display in angle degrees or gradient percentage or coded or with graphic support and/or acoustically via signals or text announcements. 13. Electronic remote spirit level according to one of the preceding claims, characterized in that the surface of the light-emitting diodes (LED) is frosted and not translucent. 14. Electronic remote spirit level according to one of the preceding claims, characterized in that for the remote setting of an inclination setting device ( 16 ) of the inclination display unit ( 14 ) an adjustment unit ( 15 ) is integrated, wherein the data is transmitted analogue or digitally by cable or wirelessly by radio connection from the inclination setting unit ( 15 ) to an actuator working as an inclination controller, the inclination setting device ( 16 ), preferably a stepper motor, wherein in the case of the wireless radio connection a second transmitting unit ( 17 ) is integrated into the inclination setting unit ( 15 ) and a second receiving unit ( 18 ) connected upstream of the inclination setting device ( 16 ). 15. Electronic remote spirit level according to claim 14, characterized in that a comparator ( 19 ) is connected between the inclination display unit ( 14 ) and the inclination setting unit ( 15 ), in which a predeterminable surface inclination is stored as an inclination target value and which, after comparison with the actual inclination value present at the inclination display unit ( 14 ), transmits a corresponding difference signal to the inclination setting device ( 16 ), whereby an automatic control of the inclination setting variable to be specified takes place.