JPH0110716Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a reception display system installed in restaurants, etc., and its purpose is to be able to arbitrarily select and display each channel on a reception unit in one place.For example, in a restaurant kitchen, To provide a reception display system capable of informing a waitress or waiter that a dish corresponding to a customer at a table is ready by displaying a channel of a reception unit installed at a counter part or the like. The present invention will be explained below with reference to embodiment figures. In Figure 1, 1 ₁ ... 1 _o are receiving units,
For example, it is placed on each table in a restaurant, and from that location it emits a unique and distinguishable display set signal by radio wave.
This radio wave is received by a receiving unit 2 provided in a counter section, for example, and a channel display is performed on a display section 3 of this receiving unit 2. 4 is a channel setting section, and 5 is a display mode changeover switch. Reference numeral 6 denotes a centralized transmission unit, which can selectively transmit display set signals corresponding to each channel by radio waves by operating the set button 7 corresponding to each channel. The channel is displayed on the display section 3 of the receiving unit 2. Although the display set signal in FIG. 1 is transmitted by radio waves, the receiving unit 2 and the centralized transmitting unit 6 may be connected by wire. FIG. 2 shows a circuit diagram of the transmitting units 1 ₁ and 1 _o , in which the channel setting section 8 is formed of something like a pin board, and the modulation section 8 is formed of an arithmetic processing LSI such as a microcomputer. A wave generating circuit 9, a reference signal generating circuit 10 with an oscillation frequency of about 300 KHz that supplies a reference clock signal to the modulated wave generating circuit 9, a carrier wave generating circuit 11 having an oscillating frequency of about 300 MHz, and this carrier wave generating circuit 11. The modulating circuit 12 is connected in series and is controlled by the output of the modulated wave generating circuit 9. Therefore, the modulated wave generation circuit 9
are connected to the respective terminals in the 4th row and 6th column of the channel setting section 8, and each of the 4th row of the channel setting section 8 selects each modulation frequency, and each of the 6th column selects each timing in time series. The output of the modulated wave generation circuit 9 sequentially specifies the readout timing of each of the six columns, and the channel set row in the specified column (that is, the modulation frequency to be generated at that timing) is specified. The reference clock signal output from the reference signal generating circuit 10 is frequency-divided based on the read data signal to output a predetermined modulated frequency signal. The modulated frequency signal, which is obtained as the output of the modulated wave generation circuit 9 and which changes moment by moment at each time point in the time series, is input to the modulation circuit 12, and the 300MHz carrier wave generated by the carrier wave generation circuit 11 is It is modulated by a modulation frequency signal obtained by combining and arranging six modulation frequencies in time series, and is emitted into space from an antenna that also serves as the oscillation coil 13. Therefore, as shown in Figure 3, the transmitted radio waves are sent as signals modulated at one of the four modulation frequencies at each of the first to sixth time timings in the time series. It is. FIG. 4 shows a circuit block diagram of the receiving unit 2, which includes, for example, a front end 14 composed of a super regenerative circuit including two transistors,
A gain amplifier 15 whose gain is set to about 80 dB,
Four band-pass type filter circuits 16 ¹ ... 16 4 whose center frequencies are set to f ₁ to f ₄ respectively, and comparators 17 ¹ ... ^{17 4 that} respectively discriminate the outputs of these filter circuits 16 ¹ ... 16 ⁴ . , a channel setting unit 4 formed of something like a pin board, and a channel determination unit formed of an arithmetic processing LSI such as a microcomputer and inputting the outputs of the ^four groups of comparators 17 ¹ ... 17 and the output of the channel setting unit 4. The channel discrimination circuit 18 stores the input signal in an internal memory, compares it with the self-set channel, and if they match, outputs a strobe signal and generates a notification sound via the monostable oscillator 19. A channel match signal is provided to circuit 20. However, the self-setting channel has a part in the internal circuit, which changes the output state (output to the binary decimal evolution decoder 21. In Fig. 4, the information processing functions of S ₅ and S ₆ are internally 21 is a binary decimal evolution decoder, 22 is an R/S latch, 23 is an output state change circuit, and 24 is a driver circuit, these are for channel display, and the output state change circuit 2
Reference numeral 3 is a display mode changeover switch 5 that allows the mode for resetting the channel display to be changed to, for example, 5-minute timer a, 1-minute timer b, or R/S latch c. The channel setting section 8 of the transmitting units ₁₁ , _1o has 1 circuit 4 contact switches _S1 to _S5 and 1 as shown in FIG.
The circuit consists of a two-contact switch _S6 . here,
If we take out only the switches S ₅ and S ₆ and look at the code signal of the modulated wave generation circuit 9, we get the following.

[Table] Here, since switch S ₆ uses a 1-circuit 2-contact switch as described above, the code signal
0001, 0011, 0101, ...1111 can be obtained and used as a set signal, but 0000, 0010, 0100...
...1110 cannot be obtained, so these signals are used as the display reset signal of the receiving unit 2. That is,
The 16 channel signals from 0000 to 1111 obtained from the channel discrimination circuit 18 of the receiving unit 2 as shown in FIG. Therefore, for example, code signals 0000, 0010, 0100...1110 are used as display reset signals, and 0001, 0011, 0101...1111
can be displayed as a set signal. Therefore, by switching the display mode changeover switch 15 to the R/S latch c, if the channel code signal described above is given to the channel discrimination circuit 18 by wireless or wired reset, the channel set by the transmitting unit 1 ₁ . . . can be displayed. Can be reset. On the other hand, the centralized transmission unit 6 is configured so that display setting signals can be transmitted separately for each channel by a combination of contacts of switches _S5 and _S6 of the channel setting section 8 so that the display can be set. A switch means having a switch structure is provided for each channel so that the combination of contacts corresponding to a predetermined channel code signal can be turned on once, and the combination can be turned on with the respective set button 7. The configuration other than this channel setting section 8 is the same as that of the transmitting unit 1. By using a four-contact type switch _S6 as shown in Fig. 7, that is, a switch that can selectively turn on f ₁ , f ₂ , f ₃ , and f ₄ , the channel corresponding to the display reset signal can be adjusted. Of course, it is also possible to transmit code signals; in this case, there are 61 centralized transmitting units and 1 receiving unit.
The display of the display section 3 can be set and reset. Now, when the display set signal is transmitted from the transmitting unit 1 installed on an appropriate table, the display set signal is sent to the receiving unit 2.
The modulated carrier wave signal received by the receiving antenna 26 is amplified and demodulated by the front end 14, and then sent to each filter circuit 16 ₁ ...1 via the gain amplifier 15.
6 Input in parallel to ₄ . Filter circuit 16 ₁ ...1
6 ₄ corresponds to each of the four modulation frequencies f ₁ ...f ₄ , and produces an output from the filter circuit 16 ₁ ... 16 ₄ that matches the frequency of the demodulated signal received at that time,
The comparators 17 ₁ ... 17 ₄ determine whether an output has occurred in each of the corresponding filter circuits 16 ₁ ... 16 ₄ , and therefore, depending on the frequency of the demodulated signal received at that time, one of the comparators 17 ₁ ...
An output is generated at ₁₇₄ and is input to the channel discrimination circuit 18. Channel discrimination circuit 18
inputs each output of the comparators 17 ₁ ... 17 ₄ as described above, and sequentially specifies signals to the pinboard matrix of the channel setting section 4, and outputs signals from the row where the channel setting in the specified column is performed. The output is read in, and if the first demodulated signal in the time series generates an output in one of the comparators 17 ₁ ... 17 ₄ , then the comparator 17 ₁ that generated this output
...17 Number ₄ and number 1 as the first in the time series
When the column read command signal is given to the channel setting section 4, the channel discriminating circuit 18 compares and discriminates the row number for which the channel is set in the first column, which is read into the channel discriminating circuit 18, and if they match. While waiting for the comparators 17 ₁ ... 17 ₄ to operate according to the next second demodulated signal, a second column read command signal is given to the channel setting section 4, and an output is generated at this second time timing as well. Comparator 17 ₁ ...17 ₄
If the number matches the number of the channel-set row in the second column, the third reception waiting state is entered in the same manner. In this way, the numbers of the activated comparators 17 ₁ ... 17 ₄ at the first to sixth time timings are set as channels in the first to fourth columns of the channel setting section 4 and inside the channel discrimination circuit 18, respectively. When all row numbers match, receiving unit 2
It is determined that the channel has been called, and a channel matching signal is output to operate the notification sound generation circuit 20 to emit a notification sound, and at the same time, the display element 25 corresponding to the channel of the transmitting unit 1 is lit to display the channel. Let's do it. The waiter or waitress who sees this will know that the customer at the predetermined table corresponding to the channel display is calling. If the built-in timer range set by the display mode switching unit 5 or the reset unit is reset, the channel display will be reset. Now, when the food ordered by the customer heard by the waiter or waitress is ready, the cook in the kitchen presses the set button 7 of the channel for the table in question on the central transmission unit 6 in the kitchen, and transmits the corresponding dish on the receiving unit 2 in the same way as described above. By displaying the channel, it is possible to notify waiters and waitresses that the food for a given table is ready. As described above, the present invention has a centralized transmitting unit that selectively transmits display set signals corresponding to each channel and causes the receiving unit to display the channels, so that each channel display on the receiving unit can be selectively displayed from one place. For example, as mentioned above, by sending a command from the centralized transmitting unit to display the channel corresponding to a predetermined transmitting unit, the system can call customers at a table in a restaurant and order from the customers at that table. The effect is that you can tell when the food is ready by the display on the receiving unit, and can quickly serve customers.In other words, by having a centralized transmitting unit installed in addition to individual transmitting units, you can set and reset the display corresponding to each channel of the receiving unit. Therefore, by installing a central transmission unit in the work department (kitchen) and installing a receiving unit in a position where it can be seen by waiters and waitresses, the work department (kitchen) and management department (waiters and waitresses) can be separated. This has the effect of allowing operations (orders) from individual sending units (customers) to be managed according to the work status in the work department.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the reception display system of the present invention, and FIG. 2 is a circuit diagram of the same transmitting unit.
Fig. 3 is a waveform diagram of the transmission signal as above, Fig. 4 is a block circuit diagram of the receiving unit as above, Fig. 5 is a configuration diagram of the channel setting section of the transmitting unit as above, and Fig. 6 is a diagram of the channel setting section of the transmitting unit as above.
This figure is a circuit diagram of a main part of the same receiving unit as above, and FIG. 7 is a block diagram of a channel setting section of a centralized transmitting unit according to another embodiment of the present invention. 1 ₁ ...1 _o ... Transmitting unit, 2... Receiving unit, 3... Display section, 6... Centralized transmitting unit.

Claims (1)

[Scope of utility model registration request] In a reception display system that receives radio waves emitted from a transmitter unit that emits display set signals unique to each location from multiple locations and displays each channel separately on a receiver unit, a display set signal corresponding to each channel is transmitted. This reception display system is provided with a centralized transmission unit that selectively transmits each channel and displays the channel at the receiving unit, and a reset function that enables the centralized transmission unit to individually transmit a display reset signal corresponding to each channel.