JP3496352B2 - Transceiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting / receiving apparatus mainly used for remote control of locking / unlocking of a door of an automobile. 2. Description of the Related Art Conventionally, the configuration of an oscillator for generating a clock employed in a transmission / reception device of this type has to be strong against vibration in consideration of the use in a vehicle, and the cost must be reduced. From the background of planning and storing parts in a limited space, etc., it is structurally vulnerable to vibration, high cost, and does not use a large ceramic oscillator (crystal oscillator) in shape. CR consisting of a resistor
An oscillator is employed. FIG. 5 shows a code structure of a transmitter of a transmission / reception apparatus which is conventionally and often employed. Data "1" has a pulse width of 2T1 in time and data "0" has a pulse width of 2T1. Width 2 is temporally composed of T1,
The pulse width obtained by doubling the pulse width 2 of the data “0” is the pulse width 1 of the data “1”, that is, the ratio of the data “1” to the data “0” is 2: 1. [0004] When the data is formed with the length of the pulse width as described above, the accuracy of the oscillation frequency of the CR oscillator is so large as ± 20% in tolerance, so that the oscillation frequency of the transmitter and the oscillation frequency of the transmitter are large. Considering that the pulse width measurement at the time of pulse reading of the receiver is shifted by ± 20%, it is impossible to judge data “1” and “0” when the pulse width is a certain value or more. turn into. Therefore, apart from the ID code TB4 having the meaning of data in the code configuration of the transmitter, the first code transmitted is the start code TS3.
The data is always set to "1" so that the data "1" and "0" can be determined at the receiver. FIG. 4 shows a configuration of a receiver of a conventional transmitting / receiving apparatus. Reference numeral 5 denotes a code length T of an input pulse.
Reference numeral 6 denotes a pulse width measurement unit for measuring S and TB, and a reference numeral 6 for calculating a pulse width data reference value for calculating the code length TS as it is and the half code length 1/2 TS from the code length of the pulse of the measured start code TS. And 7a and 7b are pulse width data reference value storage sections for storing two types of pulse width data calculated by the pulse width data reference value calculation section 6, and 8 are two types of pulse width data reference values TS and 1 / 2T
S is compared with the code length TB of the next input pulse, and a pulse width data determination unit 9 determines which code length matches the code length. Data 9 of the determined pulse width is “1”,
This is a pulse width determination data storage unit that stores “0”. The operation of the conventional transmitting / receiving apparatus will be described below with reference to FIG. FIG. 6 shows a conventional start code TS.
The method for determining data “1” and “0” corresponding to the code configuration of the transmitter having No. 3 is summarized for each process. First, in process 10, the code length of the start code sent from the transmitter is determined. measure. Next, based on the measured start code, a code length reference value of data “1” and “0” is set in processing 11. Since the start code is the code of the data “1”, the code length measured in the process 10 becomes the reference value of the data “1” as it is. Since the data “0” has a code length that is half the data length of the data “1”, half the reference value of the data “1” set earlier is set as the reference value of the data “0”. In step 12, the ID code transmitted next to the start code is received, the code length is measured, and it is determined whether the data matches the data "1" or "0" set in step 11. judge. At this time, data “1”,
It is often the case that each of the reference values of “0” is within ± 25% of the reference value. In a process 13, data of "1" and "0" determined in the process 12 is stored, and in a process 14, it is determined whether or not all the codes have been received. Return and receive the next code. If the reception is completed, the process proceeds to the next process 15 such as determination of all codes. As described above, even in the above-mentioned conventional transmitting / receiving apparatus, the code transmitted first from the transmitter is positioned as the start code 3 and is always set to “1”, so that the code length is transmitted to the receiver. If the reference values of data “1” and “0” are set, the oscillation frequency of the oscillator for generating the clock of the transmitter and receiver becomes ±
Even if there is a tolerance of 20%, "1",
The determination of “0” is possible, and the start code TS
No. 3 has no problem even if it is not "1", and there is no problem even if it is always "0". [0011] However, in the transmitting / receiving apparatus having the above-mentioned conventional configuration, since the start code TS3 is always required, the number of codes transmitted from the transmitter is two.
Even if it is 0, one of them is always "1" as a start code and cannot have information, and the ID code having information is the remaining 19, and the information amount is halved. There was a problem. The present invention solves such a conventional problem. There is no need to provide a start code in a transmitted code, and an excellent transmitting / receiving apparatus capable of giving information to all transmitted codes is provided. It is intended to provide. According to the present invention, there is provided a transmitter for transmitting signals having different pulse widths.
When a pulse width measuring unit for measuring the pulse width of the signal transmitted from the transmitter, is input to a first of said signal and the measured pulse width of one of the reference, the predetermined relative reference value
A pulse width data reference value calculating unit for setting at least three or more pulse width data reference values of a large reference value and a predetermined small reference value; and 3 for storing the pulse width data reference value.
One or more of the pulse width data reference value storage unit, the first input
Pulse width of the pulse continues after force are entered are each the
The above pulse width stored in the pulse width data reference value storage
Co and determining whether the match with any reference value of the data reference value
The pulse width data reference of the first input pulse
When a pulse with the same pulse width as the value is input, the first
Tentatively determined as the same data as the pulse input to
First, the pulse width data of the input pulse is different from the reference value.
When a pulse with a different pulse width is input, a different pulse width
Is larger or smaller than the first pulse width.
Different pulses depending on whether the pulse width data
Change to regular data including data before pulse width input
The pulse input thereafter is determined by the first pulse
Pulse different from the above pulse width data reference value corresponding to the width
The width of the data is determined by the two pulse width data reference values of the width.
A receiving unit including a pulse width data determining unit for performing determination and a determination data storage unit for storing data of the determined pulse width.
This is a transmission / reception device composed of a transceiver. [0014] According to [action] Accordingly the present invention, by providing a reference value of three or more pulse width, pulse of the first input pulse width
When a pulse having a pulse width different from the pulse width is input, normal data determination can be performed and determined, so that a start code is not required. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a receiver according to the embodiment. In FIG. 1, reference numeral 16 denotes a pulse width measuring unit for measuring the code lengths TP and TA of the inputted pulses.
Reference numeral 17 denotes a pulse width data reference value calculation unit that calculates three types of data of the code length TP of the measured pulse, the code length TP as it is, the half code length ＴＰ TP, and the double code length 2 TP, Reference numerals 18a, 18b, and 18c denote pulse width data reference value storage sections for storing the three types of pulse width data calculated by the pulse width data reference value calculation section 17, and 19 denotes three types of pulse width data reference values TP, 1/2
The pulse width data determination unit 20 compares the code length TA of the next input pulse with TP and 2TP, and determines which code length matches the code length TA. The pulse width data determination unit 20 determines the data “1”, “0” of the determined pulse width. "Is stored in the pulse width determination data storage unit. FIG. 2 shows a data structure transmitted from the transmitter, wherein all codes are ID codes 21.
And there is no start code. Reference numeral 22 denotes a pulse TP for which measurement is performed as a reference of the code length of the pulse. In this embodiment, the code length of the data is "1". However, even if the data is "0", there is no problem. It is not necessary to be "1" or always "0", and it is a code having information of "1" and "0". 23
Is a pulse TA input thereafter. Next, the operation of the above embodiment will be described with reference to FIG. First, the code length of the first input pulse TP22 is measured in process 24, and 3
The types of code length data TP, 1 / 2TP, and 2TP are calculated and set as reference values. The first input pulse TP22 is stored as temporary data "1" in the process 26. The code length of the next input pulse TA23 is measured in process 27, and in process 28, it is determined whether or not the pulse length is the same as TP. If it is the same code length as TP, it is stored as temporary data “1” in process 29,
Wait for the next pulse input. If TA is not the same code length as TP, it is determined in process 30 whether the code matches 1 / 2TP or 2TP. If the data matches 1 / 2TP, it is determined and stored as normal data "0" in the process 31, and the temporary data "1" of the previously received TP is determined as normal data "1". The data "1" is determined to be TP and the data "0" is determined to be 1 / 2TP, and the reference value of 2TP is deleted. / 2TP, which is two reference values. If it matches 2TP, it is determined and stored as regular data "1" in process 32, and the previously received TP
Is changed from the provisional data “1” to the regular data “0” and determined. Further, the data "1" is determined to be 2TP and the data "0" is determined to be TP as the reference value for determining the code length of the pulse width.
The reference value of 1 / 2TP is deleted, and pulses to be received in the future are performed using two reference values of 2TP and TP.
Thereafter, the pulse length of the input pulse is measured in process 33, and it is determined in process 34 whether the data is "1" or "0" based on the two reference values set in process 31 or process 32.
In process 35, the data is stored as data "1" or data "0". In the process 36, it is determined whether or not all the codes have been received. If not, the process returns to the process 33 to receive the next code. If the reception is completed, the process proceeds to the next process 37 such as determination of all codes. As described above, according to the above embodiment, the code length TP of the first input pulse is measured, and TP, 1/2
Three reference values of TP and 2TP are set, and when a pulse having a code length different from TP, ＴＰTP or 2TP, is input, the reference values are set to TP and ＴＰTP or two TPs of 2TP and TP to data. “1” and data “0”
Since the first input pulse has the code length of the data “1” or the code length of the data “0”, there is no problem, and the data “1” and “0” are determined. Can be determined. Therefore,
First, it is not necessary to always fix the code of the input pulse as a start code to data "1" or data "0", and the effect is that the start code can be deleted. As is apparent from the above embodiment, the present invention provides a pulse width data reference value calculating section which can set at least three or more pulse width data reference values from a measured pulse width, Three or more storage units for storing the width data reference value; and a pulse width data determination unit for determining which reference value of the three or more reference values matches the length of the input pulse. A determination data storage unit for storing data of a pulse width, wherein the data determination is performed and determined when data of a pulse width different from the first input pulse width data is input. And
First, there is an advantage that data "1" and "0" can be determined even if the code of the input pulse is not always data "1" or data "0". Is not necessary, and if the code configuration is 20, all the 20 codes can be used as the ID code.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a schematic configuration of a transmission / reception device according to an embodiment of the present invention. FIG. 2 is a waveform diagram illustrating a transmission pulse code string input to the transmission / reception device. FIG. 4 is a block diagram showing a schematic configuration of a conventional transmission / reception apparatus. FIG. 5 is a waveform chart showing a transmission pulse code string input to the conventional transmission / reception apparatus. 1 is a flowchart showing signal processing of the same apparatus. [Description of References] 1 Pulse width of data “1” 2 Pulse width of data “0” 16 Pulse width TP, TA measuring unit 17 Pulse width TP data reference value calculating unit 18a Pulse width TP data reference value storage section 18b Pulse width 1/2 TP data reference value storage section 18c Pulse width 2TP data reference value storage section 19 Pulse width TA data determination section 20 Pulse width determination data storage section The first signal processing content of transmitting and receiving device of pulse code TP 23 pulse code TA 24 to 37 present invention to be subsequently input after the TP to be created 1 ID code 22 reference value

Claims (1)

(57) [Claims 1] A transmitter for transmitting signals of different pulse widths
When a predetermined pulse width measuring unit, a first one of the reference value input measured pulse width 1 of the signal, with respect to the reference value for measuring the pulse width of the signal transmitted from the transmitter
And pulse width data reference value calculating section for setting at least three or more pulse width data reference value of the atmospheric becomes the reference value and predetermined small becomes a reference value of three or more pulse width for storing the pulse width data reference value a data reference value storage unit, the first
Pulse width of continued since the input are entered pulses, each of the upper
The above pulse stored in the pulse width data reference value storage unit
And determining whether the match with any reference value of the width data reference value
Both are based on the pulse width data base of the first input pulse.
When a pulse with the same pulse width as the reference value is input,
Provisionally determined as the same data as the pulse input to 1,
The pulse width data of the first input pulse differs from the reference value.
When a pulse with a pulse width of
A pulse whose width is larger or smaller than the first pulse width.
Different pulses depending on whether the pulse width data
Change to regular data including data before pulse width input
The pulse input thereafter is determined by the first pulse
Pulse different from the above pulse width data reference value corresponding to the width
The width of the data is determined by the two pulse width data reference values of the width.
A receiving unit including a pulse width data determining unit for performing determination and a determination data storage unit for storing data of the determined pulse width.
Transceiver apparatus comprising a signal device.